diff --git a/2048.html b/2048.html
index 73b338c..197dd56 100644
--- a/2048.html
+++ b/2048.html
@@ -381,5 +381,11 @@
     </div>
     <script src="Score_Request.js"></script>
     <script src="2048.js"></script>
+    <script src="Audio_2048.js"></script>
+    <script src="Visual_Effects_2048.js"></script>
+    <script src="User_Interface_2048.js"></script>
+    <script src="2048_Logic.js"></script>
+    <script src="2048_Controls.js"></script>
+    <script src="Main_2048.js"></script>
   </body>
 </html>
diff --git a/2048.js b/2048.js
index 4d85301..b296052 100644
--- a/2048.js
+++ b/2048.js
@@ -1,31 +1,21 @@
 /* ------------------------
-   State & Variables
+   1. GAME STATE & VARIABLES
    ------------------------ */
 let board = [];
 let currentScore = 0;
 
-// 1. Ambil username dari sessionStorage (sesuai sistem login kamu)
+// Ambil username dari sessionStorage
 const currentUser = sessionStorage.getItem("loggedInUser") || "guest";
 
-// 2. Buat nama kunci unik, misal: "highScore2048_budi"
+// Buat nama kunci unik
 const storageKey = 'highScore2048_' + currentUser;
 
-// 3. Ambil skor milik user tersebut saja
-
+// Ambil skor milik user tersebut
 let highScore = parseInt(localStorage.getItem(storageKey)) || 0;
 let lastMoveDir = null;
 let isMoving = false;
 let mergesInCurrentMove = 0;
 
-/* ------------------------
-   Audio Setup
-   ------------------------ */
-const audio = {
-  bg: new Audio("Background_Music.mp3"),
-  pop: new Audio("Pop.mp3"),
-  merge: new Audio("Merge.mp3")
-};
-
 // Sound State (baca dari localStorage atau default ON)
 let soundState = {
   bg: localStorage.getItem('sound_bg') !== 'false',
@@ -33,961 +23,9 @@ let soundState = {
   merge: localStorage.getItem('sound_merge') !== 'false'
 };
 
-// Update audio volumes based on state
-function updateAudioVolumes() {
-  audio.bg.volume = soundState.bg ? 0.25 : 0;
-  audio.pop.volume = soundState.pop ? 0.9 : 0;
-  audio.merge.volume = soundState.merge ? 1.0 : 0;
-}
-
-audio.bg.loop = true;
-
-function tryPlayBg() {
-  if (!soundState.bg) return; // Jangan play kalau muted
-  
-  audio.bg.play().catch(() => {
-    const unlock = () => {
-      if (soundState.bg) audio.bg.play().catch(()=>{});
-      window.removeEventListener("keydown", unlock);
-      window.removeEventListener("click", unlock);
-    };
-    window.addEventListener("keydown", unlock, { once: true });
-    window.addEventListener("click", unlock, { once: true });
-  });
-}
-
-/* ===== AUTO TUTORIAL FOR FIRST TIME USERS ===== */
-function checkAndShowTutorial() {
-  const showTutorial = sessionStorage.getItem("showTutorial");
-  const loggedInUser = sessionStorage.getItem("loggedInUser");
-  
-  // Jika user baru (showTutorial = "true"), tampilkan tutorial otomatis
-  if (showTutorial === "true" && loggedInUser) {
-    setTimeout(() => {
-      const tutorialOverlay = document.getElementById('tutorial-overlay');
-      if (tutorialOverlay) {
-        tutorialOverlay.style.display = 'flex';
-      }
-      // Set flag agar tidak muncul lagi di session ini
-      sessionStorage.setItem("showTutorial", "false");
-    }, 500); // Delay 500ms agar halaman sudah fully loaded
-  }
-}
-
-/* ------------------------
-   DOM Ready
-   ------------------------ */
-document.addEventListener("DOMContentLoaded", () => {
-  updateHighScoreDisplay();
-  setupBoard();
-  addNewTile();
-  addNewTile();
-  updateAudioVolumes(); // Apply saved sound settings
-  tryPlayBg();
-  document.addEventListener("keydown", handleKey);
-  setupEventListeners();
-  checkAndShowTutorial();  
-});
-
-/* ------------------------
-   Event Listeners Setup
-   ------------------------ */
-function setupEventListeners() {
-  // Tutorial Modal
-  const btnTutorial = document.getElementById('btn-tutorial');
-  const tutorialOverlay = document.getElementById('tutorial-overlay');
-  const closeTutorial = document.getElementById('close-tutorial');
-
-  if (btnTutorial) {
-    btnTutorial.addEventListener('click', function() {
-      tutorialOverlay.style.display = 'flex';
-    });
-  }
-
-  if (closeTutorial) {
-    closeTutorial.addEventListener('click', function() {
-      tutorialOverlay.style.display = 'none';
-    });
-  }
-
-  if (tutorialOverlay) {
-    tutorialOverlay.addEventListener('click', function(e) {
-      if (e.target === tutorialOverlay) {
-        tutorialOverlay.style.display = 'none';
-      }
-    });
-  }
-
-  // Restart button (top right)
-  const btnRestart = document.getElementById('btn-restart');
-  if (btnRestart) {
-    btnRestart.addEventListener('click', restartGame);
-  }
-
-  // Game over modal buttons
-  const btnPlayAgain = document.getElementById('btn-play-again');
-  const btnHome = document.getElementById('btn-home');
-  const gameOverClose = document.getElementById('game-over-close');
-  
-  if (btnPlayAgain) {
-    btnPlayAgain.addEventListener('click', playAgain);
-  }
-  
-  if (btnHome) {
-    btnHome.addEventListener('click', goHome);
-  }
-
-  if (gameOverClose) {
-    gameOverClose.addEventListener('click', hideGameOver);
-  }
-
-  const gameOverOverlay = document.getElementById('game-over-overlay');
-  if (gameOverOverlay) {
-    gameOverOverlay.addEventListener('click', function(e) {
-      if (e.target === this) {
-        hideGameOver();
-      }
-    });
-  }
-
-  // Sound Control Buttons
-  const btnSoundBg = document.getElementById('btn-sound-bg');
-  const btnSoundPop = document.getElementById('btn-sound-pop');
-  const btnSoundMerge = document.getElementById('btn-sound-merge');
-
-  if (btnSoundBg) {
-    btnSoundBg.addEventListener('click', () => toggleSound('bg'));
-    updateSoundButtonState(btnSoundBg, soundState.bg);
-  }
-
-  if (btnSoundPop) {
-    btnSoundPop.addEventListener('click', () => toggleSound('pop'));
-    updateSoundButtonState(btnSoundPop, soundState.pop);
-  }
-
-  if (btnSoundMerge) {
-    btnSoundMerge.addEventListener('click', () => toggleSound('merge'));
-    updateSoundButtonState(btnSoundMerge, soundState.merge);
-  }
-}
-
-/* ------------------------
-   Setup & Rendering
-   ------------------------ */
-function setupBoard() {
-  board = [];
-  currentScore = 0;
-  updateScoreDisplay();
-
-  const container = document.getElementById("board");
-  if (!container) {
-    console.error("Board element not found (#board).");
-    return;
-  }
-
-  container.innerHTML = "";
-  for (let r = 0; r < 4; r++) {
-    board[r] = [];
-    for (let c = 0; c < 4; c++) {
-      board[r][c] = 0;
-      const tile = document.createElement("div");
-      tile.id = `${r}-${c}`;
-      tile.className = "tile";
-      container.appendChild(tile);
-    }
-  }
-}
-
-function updateTile(row, col, num) {
-  const tile = document.getElementById(`${row}-${col}`);
-  if (!tile) return;
-
-  tile.className = "tile";
-
-  if (num > 0) {
-    tile.textContent = num;
-    tile.classList.add("tile-" + num);
-  } else {
-    tile.textContent = "";
-  }
-}
-
-function refreshBoard() {
-  for (let r = 0; r < 4; r++) {
-    for (let c = 0; c < 4; c++) {
-      updateTile(r, c, board[r][c]);
-    }
-  }
-  updateScoreDisplay();
-}
-
-/* ------------------------
-   Score Management
-   ------------------------ */
-function updateScoreDisplay() {
-  const scoreEl = document.getElementById("score");
-  if (scoreEl) {
-    scoreEl.textContent = currentScore;
-  }
-  
-  if (currentScore > highScore) {
-    highScore = currentScore;
-    // Gunakan storageKey yang sudah kita buat di atas (dinamis sesuai user)
-    localStorage.setItem(storageKey, highScore); 
-    updateHighScoreDisplay();
-}
-  }
-
-function updateHighScoreDisplay() {
-  const highScoreEl = document.getElementById('high-score');
-  if (highScoreEl) {
-    highScoreEl.textContent = highScore;
-  }
-}
-
-function resetScore() {
-  currentScore = 0;
-  updateScoreDisplay();
-}
-
-/* ------------------------
-   Add New Tile
-   ------------------------ */
-function addNewTile() {
-  const empty = [];
-  for (let r = 0; r < 4; r++) {
-    for (let c = 0; c < 4; c++) {
-      if (board[r][c] === 0) empty.push({ r, c });
-    }
-  }
-
-  if (empty.length === 0) return false;
-
-  const spot = empty[Math.floor(Math.random() * empty.length)];
-  board[spot.r][spot.c] = 2;
-
-  const tile = document.getElementById(`${spot.r}-${spot.c}`);
-  if (tile) {
-    tile.classList.add("new");
-    playSound(audio.pop);
-    setTimeout(() => tile.classList.remove("new"), 300);
-  }
-  updateTile(spot.r, spot.c, 2);
-  return true;
-}
-
-/* Safe playSound with mute check */
-function playSound(soundObj) {
-  try {
-    // Check if sound is enabled
-    if (soundObj === audio.pop && !soundState.pop) return;
-    if (soundObj === audio.merge && !soundState.merge) return;
-    if (soundObj === audio.bg && !soundState.bg) return;
-    
-    soundObj.currentTime = 0;
-    soundObj.play().catch(() => {});
-  } catch (e) {}
-}
-
-/* ------------------------
-   Movement Logic
-   ------------------------ */
-function filterZero(row) {
-  return row.filter(n => n !== 0);
-}
-
-function slide(row) {
-  row = filterZero(row);
-  let mergedThisMove = false;
-  let mergedPositions = [];
-  let mergeCount = 0;
-
-  for (let i = 0; i < row.length - 1; i++) {
-    if (row[i] === row[i + 1]) {
-      row[i] = row[i] * 2;
-      
-      playSound(audio.merge);
-      
-      if (navigator.vibrate) {
-        navigator.vibrate([80, 20, 80]);
-      }
-
-      currentScore += row[i];
-      row[i + 1] = 0;
-      mergedThisMove = true;
-      mergedPositions.push(i);
-      mergeCount++;
-    }
-  }
-
-  row = filterZero(row);
-  while (row.length < 4) row.push(0);
-  return { row, merged: mergedThisMove, mergedPositions, mergeCount };
-}
-
-function arraysEqual(a, b) {
-  return a.length === b.length && a.every((v, i) => v === b[i]);
-}
-
-/* Move functions */
-function moveLeft() {
-  let moved = false;
-  let mergedCells = [];
-  mergesInCurrentMove = 0;
-  
-  for (let r = 0; r < 4; r++) {
-    const { row: newRow, mergedPositions, mergeCount } = slide(board[r]);
-    if (!arraysEqual(newRow, board[r])) moved = true;
-    board[r] = newRow;
-    
-    mergesInCurrentMove += mergeCount;
-    
-    if (mergedPositions && mergedPositions.length > 0) {
-      mergedPositions.forEach(c => {
-        mergedCells.push({ r, c });
-      });
-    }
-  }
-  
-  if (moved) {
-    refreshBoard();
-    triggerComboEffect(mergedCells, mergesInCurrentMove);
-  }
-  return moved;
-}
-
-function moveRight() {
-  let moved = false;
-  let mergedCells = [];
-  mergesInCurrentMove = 0;
-  
-  for (let r = 0; r < 4; r++) {
-    let reversed = [...board[r]].reverse();
-    const { row: slid, mergedPositions, mergeCount } = slide(reversed);
-    let newRow = slid.reverse();
-    if (!arraysEqual(newRow, board[r])) moved = true;
-    board[r] = newRow;
-    
-    mergesInCurrentMove += mergeCount;
-    
-    if (mergedPositions && mergedPositions.length > 0) {
-      mergedPositions.forEach(pos => {
-        const c = 3 - pos;
-        mergedCells.push({ r, c });
-      });
-    }
-  }
-  
-  if (moved) {
-    refreshBoard();
-    triggerComboEffect(mergedCells, mergesInCurrentMove);
-  }
-  return moved;
-}
-
-function moveUp() {
-  let moved = false;
-  let mergedCells = [];
-  mergesInCurrentMove = 0;
-  
-  for (let c = 0; c < 4; c++) {
-    const col = [board[0][c], board[1][c], board[2][c], board[3][c]];
-    const { row: newCol, mergedPositions, mergeCount } = slide(col);
-    for (let r = 0; r < 4; r++) {
-      if (board[r][c] !== newCol[r]) moved = true;
-      board[r][c] = newCol[r];
-    }
-    
-    mergesInCurrentMove += mergeCount;
-    
-    if (mergedPositions && mergedPositions.length > 0) {
-      mergedPositions.forEach(r => {
-        mergedCells.push({ r, c });
-      });
-    }
-  }
-  
-  if (moved) {
-    refreshBoard();
-    triggerComboEffect(mergedCells, mergesInCurrentMove);
-  }
-  return moved;
-}
-
-function moveDown() {
-  let moved = false;
-  let mergedCells = [];
-  mergesInCurrentMove = 0;
-  
-  for (let c = 0; c < 4; c++) {
-    const col = [board[3][c], board[2][c], board[1][c], board[0][c]];
-    const { row: slid, mergedPositions, mergeCount } = slide(col);
-    const newCol = slid.reverse();
-    for (let r = 0; r < 4; r++) {
-      if (board[r][c] !== newCol[r]) moved = true;
-      board[r][c] = newCol[r];
-    }
-    
-    mergesInCurrentMove += mergeCount;
-    
-    if (mergedPositions && mergedPositions.length > 0) {
-      mergedPositions.forEach(pos => {
-        const r = 3 - pos;
-        mergedCells.push({ r, c });
-      });
-    }
-  }
-  
-  if (moved) {
-    refreshBoard();
-    triggerComboEffect(mergedCells, mergesInCurrentMove);
-  }
-  return moved;
-}
-
-/* ------------------------
-   Input Handling
-   ------------------------ */
-function handleKey(e) {
-  if (isMoving) return;
-  
-  let moved = false;
-  
-  if (e.key === "ArrowLeft") { 
-    e.preventDefault();
-    moved = moveLeft(); 
-  }
-  else if (e.key === "ArrowRight") { 
-    e.preventDefault();
-    moved = moveRight(); 
-  }
-  else if (e.key === "ArrowUp") { 
-    e.preventDefault();
-    moved = moveUp(); 
-  }
-  else if (e.key === "ArrowDown") { 
-    e.preventDefault();
-    moved = moveDown(); 
-  }
-  else if (e.key === "a" || e.key === "A") {
-    e.preventDefault();
-    moved = moveLeft();
-  }
-  else if (e.key === "d" || e.key === "D") {
-    e.preventDefault();
-    moved = moveRight();
-  }
-  else if (e.key === "w" || e.key === "W") {
-    e.preventDefault();
-    moved = moveUp();
-  }
-  else if (e.key === "s" || e.key === "S") {
-    e.preventDefault();
-    moved = moveDown();
-  }
-
-  if (moved) {
-    isMoving = true;
-    setTimeout(() => {
-      const added = addNewTile();
-      if (!added || !canMove()) {
-        setTimeout(() => showGameOver(), 300);
-      }
-      isMoving = false;
-    }, 100);
-  } else {
-    const b = document.getElementById("board");
-    if (b) {
-      b.classList.add("shake");
-      setTimeout(()=>b.classList.remove("shake"), 400);
-    }
-  }
-}
-
-function canMove() {
-  for (let r = 0; r < 4; r++) {
-    for (let c = 0; c < 4; c++) {
-      if (board[r][c] === 0) return true;
-    }
-  }
-  
-  for (let r = 0; r < 4; r++) {
-    for (let c = 0; c < 4; c++) {
-      const current = board[r][c];
-      if (c < 3 && board[r][c + 1] === current) return true;
-      if (r < 3 && board[r + 1][c] === current) return true;
-    }
-  }
-  
-  return false;
-}
-
-/* ------------------------
-   Touch Swipe
-   ------------------------ */
-let touchStartX = 0;
-let touchStartY = 0;
-
-document.addEventListener("touchstart", function (e) {
-  const t = e.touches[0];
-  touchStartX = t.clientX;
-  touchStartY = t.clientY;
-}, { passive: true });
-
-document.addEventListener("touchend", function (e) {
-  if (isMoving) return;
-  
-  const t = e.changedTouches[0];
-  const dx = t.clientX - touchStartX;
-  const dy = t.clientY - touchStartY;
-  
-  let moved = false;
-  
-  if (Math.abs(dx) > Math.abs(dy) && Math.abs(dx) > 30) {
-    if (dx > 0) { 
-      moved = moveRight();
-    } else { 
-      moved = moveLeft();
-    }
-  } else if (Math.abs(dy) > 30) {
-    if (dy > 0) { 
-      moved = moveDown();
-    } else { 
-      moved = moveUp();
-    }
-  }
-  
-  if (moved) {
-    isMoving = true;
-    setTimeout(() => {
-      const added = addNewTile();
-      if (!added || !canMove()) {
-        setTimeout(() => showGameOver(), 300);
-      }
-      isMoving = false;
-    }, 100);
-  }
-}, { passive: true });
-
-/* ------------------------
-   Game Controls
-   ------------------------ */
-function restartGame() {
-  hideGameOver();
-  resetScore();
-  setupBoard();
-  addNewTile();
-  addNewTile();
-  refreshBoard();
-  isMoving = false;
-}
-
-function playAgain() {
-  restartGame();
-}
-
-function goHome() {
-  try { 
-    audio.bg.pause(); 
-    audio.bg.currentTime = 0; 
-  } catch (e) {}
-  window.location.href = "Homepage.html";
-}
-
-/* ------------------------
-   Game Over Modal
-   ------------------------ */
-function showGameOver() {
-  const finalScore = currentScore;
-
-  // --- TAMBAHKAN BAGIAN INI (MULAI) ---
-  // Mengecek apakah fungsi saveScore ada (dari file Score_Request.js)
-  if (typeof saveScore === 'function') {
-      console.log("Mengirim skor ke database:", finalScore); // Debugging
-      saveScore(finalScore);
-  } else {
-      console.error("Fungsi saveScore tidak ditemukan! Pastikan Score_Request.js sudah diload.");
-  }
-
-  const isNewHighScore = finalScore >= highScore && finalScore > 0;
-  
-  const finalScoreEl = document.getElementById('final-score');
-  if (finalScoreEl) {
-    finalScoreEl.textContent = finalScore;
-  }
-  
-  const newHighScoreBadge = document.getElementById('new-high-score-badge');
-  const highScoreDisplay = document.getElementById('high-score-display');
-  
-  if (isNewHighScore) {
-    if (newHighScoreBadge) newHighScoreBadge.style.display = 'inline-block';
-    if (highScoreDisplay) highScoreDisplay.style.display = 'none';
-  } else {
-    if (newHighScoreBadge) newHighScoreBadge.style.display = 'none';
-    if (highScoreDisplay) highScoreDisplay.style.display = 'block';
-    const modalHighScore = document.getElementById('modal-high-score');
-    if (modalHighScore) modalHighScore.textContent = highScore;
-  }
-  
-  const gameOverOverlay = document.getElementById('game-over-overlay');
-  if (gameOverOverlay) {
-    gameOverOverlay.style.display = 'flex';
-  }
-}
-
-function hideGameOver() {
-  const gameOverOverlay = document.getElementById('game-over-overlay');
-  if (gameOverOverlay) {
-    gameOverOverlay.style.display = 'none';
-  }
-}
-
-/* =============================================
-   ADVANCED VOLUME CONTROL SYSTEM
-   ============================================= */
-
 // Volume State (0-100 for each sound)
 let volumeState = {
   music: parseInt(localStorage.getItem('vol_music')) || 25,
   pop: parseInt(localStorage.getItem('vol_pop')) || 90,
   merge: parseInt(localStorage.getItem('vol_merge')) || 100
-};
-
-// Apply volumes on load
-function initVolumeControl() {
-  // Set audio volumes
-  audio.bg.volume = volumeState.music / 100;
-  audio.pop.volume = volumeState.pop / 100;
-  audio.merge.volume = volumeState.merge / 100;
-  
-  // Update sliders
-  const musicSlider = document.getElementById('vol-music');
-  const popSlider = document.getElementById('vol-pop');
-  const mergeSlider = document.getElementById('vol-merge');
-  
-  if (musicSlider) {
-    musicSlider.value = volumeState.music;
-    updateSliderFill(musicSlider, volumeState.music);
-    document.getElementById('vol-music-display').textContent = volumeState.music + '%';
-  }
-  
-  if (popSlider) {
-    popSlider.value = volumeState.pop;
-    updateSliderFill(popSlider, volumeState.pop);
-    document.getElementById('vol-pop-display').textContent = volumeState.pop + '%';
-  }
-  
-  if (mergeSlider) {
-    mergeSlider.value = volumeState.merge;
-    updateSliderFill(mergeSlider, volumeState.merge);
-    document.getElementById('vol-merge-display').textContent = volumeState.merge + '%';
-  }
-  
-  updateMainSoundIcon();
-  
-  // Event listeners for sliders
-  if (musicSlider) {
-    musicSlider.addEventListener('input', (e) => {
-      const val = parseInt(e.target.value);
-      volumeState.music = val;
-      audio.bg.volume = val / 100;
-      localStorage.setItem('vol_music', val);
-      document.getElementById('vol-music-display').textContent = val + '%';
-      updateSliderFill(e.target, val);
-      updateMainSoundIcon();
-      
-      // Auto-play BG music if volume > 0
-      if (val > 0 && audio.bg.paused) {
-        tryPlayBg();
-      } else if (val === 0) {
-        audio.bg.pause();
-      }
-    });
-  }
-  
-  if (popSlider) {
-    popSlider.addEventListener('input', (e) => {
-      const val = parseInt(e.target.value);
-      volumeState.pop = val;
-      audio.pop.volume = val / 100;
-      localStorage.setItem('vol_pop', val);
-      document.getElementById('vol-pop-display').textContent = val + '%';
-      updateSliderFill(e.target, val);
-      updateMainSoundIcon();
-    });
-  }
-  
-  if (mergeSlider) {
-    mergeSlider.addEventListener('input', (e) => {
-      const val = parseInt(e.target.value);
-      volumeState.merge = val;
-      audio.merge.volume = val / 100;
-      localStorage.setItem('vol_merge', val);
-      document.getElementById('vol-merge-display').textContent = val + '%';
-      updateSliderFill(e.target, val);
-      updateMainSoundIcon();
-    });
-  }
-  
-  // Toggle panel visibility
-  const btnSoundMain = document.getElementById('btn-sound-main');
-  const volumePanel = document.getElementById('volume-panel');
-  
-  if (btnSoundMain && volumePanel) {
-    btnSoundMain.addEventListener('click', (e) => {
-      e.stopPropagation();
-      const isVisible = volumePanel.style.display === 'block';
-      volumePanel.style.display = isVisible ? 'none' : 'block';
-    });
-    
-    // Close panel when clicking outside
-    document.addEventListener('click', (e) => {
-      if (!volumePanel.contains(e.target) && !btnSoundMain.contains(e.target)) {
-        volumePanel.style.display = 'none';
-      }
-    });
-    
-    // Prevent panel click from closing
-    volumePanel.addEventListener('click', (e) => {
-      e.stopPropagation();
-    });
-  }
-}
-
-// Update slider fill effect
-function updateSliderFill(slider, value) {
-  slider.style.setProperty('--value', value + '%');
-}
-
-// Update main sound icon based on volumes
-function updateMainSoundIcon() {
-  const btnMain = document.getElementById('btn-sound-main');
-  if (!btnMain) return;
-  
-  const iconFull = btnMain.querySelector('.sound-full');
-  const iconMedium = btnMain.querySelector('.sound-medium');
-  const iconLow = btnMain.querySelector('.sound-low');
-  const iconMuted = btnMain.querySelector('.sound-muted');
-  
-  // Calculate total volume average
-  const totalVolume = volumeState.music + volumeState.pop + volumeState.merge;
-  const avgVolume = totalVolume / 3;
-  
-  // Hide all icons first
-  iconFull.style.display = 'none';
-  iconMedium.style.display = 'none';
-  iconLow.style.display = 'none';
-  iconMuted.style.display = 'none';
-  
-  // Show appropriate icon based on average
-  if (totalVolume === 0) {
-    iconMuted.style.display = 'block';
-    btnMain.classList.add('all-muted');
-  } else {
-    btnMain.classList.remove('all-muted');
-    
-    if (avgVolume >= 60) {
-      iconFull.style.display = 'block';
-    } else if (avgVolume >= 30) {
-      iconMedium.style.display = 'block';
-    } else {
-      iconLow.style.display = 'block';
-    }
-  }
-}
-
-// Initialize on DOM load (add this to your existing DOMContentLoaded)
-document.addEventListener("DOMContentLoaded", () => {
-  // ... existing code ...
-  initVolumeControl(); // ADD THIS LINE
-});
-
-/* =============================================
-   COMBO EFFECTS
-   ============================================= */
-function triggerComboEffect(mergedCells, comboCount) {
-  if (mergedCells.length === 0) return;
-  
-  mergedCells.forEach(cell => {
-    const tile = document.getElementById(`${cell.r}-${cell.c}`);
-    if (!tile) return;
-    
-    tile.classList.add('merge');
-    setTimeout(() => tile.classList.remove('merge'), 300);
-    
-    createParticleBurst(tile);
-    
-    tile.style.boxShadow = '0 0 40px currentColor';
-    setTimeout(() => {
-      tile.style.boxShadow = '';
-    }, 300);
-    
-    const rect = tile.getBoundingClientRect();
-    const centerX = rect.left + rect.width / 2;
-    const centerY = rect.top + rect.height / 2;
-    const tileValue = parseInt(tile.textContent);
-    createScorePopup(centerX, centerY, tileValue);
-  });
-  
-  if (comboCount >= 2) {
-    showComboPopup(comboCount);
-  }
-}
-
-function showComboPopup(comboCount) {
-  const board = document.getElementById('board');
-  if (!board) return;
-  
-  const rect = board.getBoundingClientRect();
-  const centerX = rect.left + rect.width / 2;
-  const centerY = rect.top + rect.height / 2;
-  
-  const popup = document.createElement('div');
-  popup.className = 'combo-popup';
-  popup.style.left = centerX + 'px';
-  popup.style.top = centerY + 'px';
-  popup.style.position = 'fixed';
-  popup.style.fontWeight = '900';
-  popup.style.pointerEvents = 'none';
-  popup.style.zIndex = '9999';
-  popup.style.transform = 'translate(-50%, -50%)';
-  popup.style.textTransform = 'uppercase';
-  popup.style.letterSpacing = '3px';
-  
-  if (comboCount === 2) {
-    popup.textContent = 'COMBO x2!';
-    popup.style.fontSize = '36px';
-    popup.style.color = '#00ff99';
-    popup.style.textShadow = '0 0 30px rgba(0, 255, 153, 1), 0 0 50px rgba(0, 255, 153, 0.5)';
-  } else if (comboCount === 3) {
-    popup.textContent = 'AMAZING x3!';
-    popup.style.fontSize = '42px';
-    popup.style.color = '#ff00ff';
-    popup.style.textShadow = '0 0 35px rgba(255, 0, 255, 1), 0 0 60px rgba(255, 0, 255, 0.6)';
-  } else if (comboCount >= 4) {
-    popup.textContent = 'PERFECT x' + comboCount + '!';
-    popup.style.fontSize = '48px';
-    popup.style.color = '#ffd700';
-    popup.style.textShadow = '0 0 40px rgba(255, 215, 0, 1), 0 0 70px rgba(255, 215, 0, 0.7)';
-  }
-  
-  document.body.appendChild(popup);
-  
-  popup.animate([
-    { 
-      transform: 'translate(-50%, -50%) scale(0.3) rotate(-10deg)',
-      opacity: 0
-    },
-    { 
-      transform: 'translate(-50%, -50%) scale(1.3) rotate(5deg)',
-      opacity: 1,
-      offset: 0.3
-    },
-    {
-      transform: 'translate(-50%, -50%) scale(1.1) rotate(-2deg)',
-      opacity: 1,
-      offset: 0.6
-    },
-    { 
-      transform: 'translate(-50%, -50%) scale(0.8) rotate(0deg)',
-      opacity: 0
-    }
-  ], {
-    duration: 1200,
-    easing: 'cubic-bezier(0.34, 1.56, 0.64, 1)'
-  }).onfinish = () => popup.remove();
-}
-
-function createParticleBurst(tileElement) {
-  const rect = tileElement.getBoundingClientRect();
-  const centerX = rect.left + rect.width / 2;
-  const centerY = rect.top + rect.height / 2;
-  
-  const tileValue = parseInt(tileElement.textContent);
-  const tileColor = getTileColor(tileValue);
-  
-  const particleCount = 8 + Math.floor(Math.random() * 5);
-  
-  for (let i = 0; i < particleCount; i++) {
-    const particle = document.createElement('div');
-    particle.className = 'merge-particle';
-    particle.style.left = centerX + 'px';
-    particle.style.top = centerY + 'px';
-    particle.style.background = tileColor;
-    
-    document.body.appendChild(particle);
-    
-    const angle = (Math.PI * 2 * i) / particleCount + (Math.random() - 0.5) * 0.5;
-    const velocity = 60 + Math.random() * 40;
-    const tx = Math.cos(angle) * velocity;
-    const ty = Math.sin(angle) * velocity;
-    
-    particle.animate([
-      { 
-        transform: 'translate(0, 0) scale(1)',
-        opacity: 1
-      },
-      { 
-        transform: `translate(${tx}px, ${ty}px) scale(0)`,
-        opacity: 0
-      }
-    ], {
-      duration: 500 + Math.random() * 200,
-      easing: 'cubic-bezier(0.25, 0.46, 0.45, 0.94)'
-    }).onfinish = () => particle.remove();
-  }
-}
-
-function createScorePopup(x, y, score) {
-  const popup = document.createElement('div');
-  popup.className = 'score-popup';
-  popup.textContent = '+' + score;
-  popup.style.left = x + 'px';
-  popup.style.top = y + 'px';
-  popup.style.position = 'fixed';
-  popup.style.fontSize = '24px';
-  popup.style.fontWeight = '900';
-  popup.style.color = '#ffd700';
-  popup.style.textShadow = '0 0 20px rgba(255, 215, 0, 0.8)';
-  popup.style.pointerEvents = 'none';
-  popup.style.zIndex = '9999';
-  popup.style.transform = 'translate(-50%, -50%)';
-  
-  document.body.appendChild(popup);
-  
-  popup.animate([
-    { 
-      transform: 'translate(-50%, -50%) scale(0.5)',
-      opacity: 0
-    },
-    { 
-      transform: 'translate(-50%, -70px) scale(1.2)',
-      opacity: 1,
-      offset: 0.3
-    },
-    { 
-      transform: 'translate(-50%, -120px) scale(1)',
-      opacity: 0
-    }
-  ], {
-    duration: 1000,
-    easing: 'cubic-bezier(0.34, 1.56, 0.64, 1)'
-  }).onfinish = () => popup.remove();
-}
-
-function getTileColor(value) {
-  const colors = {
-    2: '#00eaff',
-    4: '#00ff99',
-    8: '#ff00ff',
-    16: '#ff0066',
-    32: '#ffaa00',
-    64: '#ff0000',
-    128: '#5f00ff',
-    256: '#00ffea',
-    512: '#ff00aa',
-    1024: '#00ffaa',
-    2048: '#ffd700'
-  };
-  return colors[value] || '#00eaff';
-}
\ No newline at end of file
+};
\ No newline at end of file
diff --git a/2048_Controls.js b/2048_Controls.js
new file mode 100644
index 0000000..2a11374
--- /dev/null
+++ b/2048_Controls.js
@@ -0,0 +1,71 @@
+/* ------------------------
+   6. INPUT HANDLER
+   ------------------------ */
+function handleKey(e) {
+  if (isMoving) return;
+  
+  let moved = false;
+  const k = e.key;
+  
+  if (k === "ArrowLeft" || k === "a" || k === "A") { e.preventDefault(); moved = moveLeft(); }
+  else if (k === "ArrowRight" || k === "d" || k === "D") { e.preventDefault(); moved = moveRight(); }
+  else if (k === "ArrowUp" || k === "w" || k === "W") { e.preventDefault(); moved = moveUp(); }
+  else if (k === "ArrowDown" || k === "s" || k === "S") { e.preventDefault(); moved = moveDown(); }
+
+  if (moved) {
+    isMoving = true;
+    setTimeout(() => {
+      const added = addNewTile();
+      if (!added || !canMove()) {
+        setTimeout(() => showGameOver(), 300);
+      }
+      isMoving = false;
+    }, 100);
+  } else {
+    // Shake effect on invalid move
+    const b = document.getElementById("board");
+    if (b) {
+      b.classList.add("shake");
+      setTimeout(()=>b.classList.remove("shake"), 400);
+    }
+  }
+}
+
+/* Touch Swipe */
+let touchStartX = 0;
+let touchStartY = 0;
+
+document.addEventListener("touchstart", function (e) {
+  const t = e.touches[0];
+  touchStartX = t.clientX;
+  touchStartY = t.clientY;
+}, { passive: true });
+
+document.addEventListener("touchend", function (e) {
+  if (isMoving) return;
+  
+  const t = e.changedTouches[0];
+  const dx = t.clientX - touchStartX;
+  const dy = t.clientY - touchStartY;
+  
+  let moved = false;
+  
+  if (Math.abs(dx) > Math.abs(dy) && Math.abs(dx) > 30) {
+    if (dx > 0) moved = moveRight();
+    else moved = moveLeft();
+  } else if (Math.abs(dy) > 30) {
+    if (dy > 0) moved = moveDown();
+    else moved = moveUp();
+  }
+  
+  if (moved) {
+    isMoving = true;
+    setTimeout(() => {
+      const added = addNewTile();
+      if (!added || !canMove()) {
+        setTimeout(() => showGameOver(), 300);
+      }
+      isMoving = false;
+    }, 100);
+  }
+}, { passive: true });
\ No newline at end of file
diff --git a/2048_Logic.js b/2048_Logic.js
new file mode 100644
index 0000000..2d7bf53
--- /dev/null
+++ b/2048_Logic.js
@@ -0,0 +1,195 @@
+/* ------------------------
+   5. GAME LOGIC
+   ------------------------ */
+function addNewTile() {
+  const empty = [];
+  for (let r = 0; r < 4; r++) {
+    for (let c = 0; c < 4; c++) {
+      if (board[r][c] === 0) empty.push({ r, c });
+    }
+  }
+
+  if (empty.length === 0) return false;
+
+  const spot = empty[Math.floor(Math.random() * empty.length)];
+  board[spot.r][spot.c] = 2;
+
+  const tile = document.getElementById(`${spot.r}-${spot.c}`);
+  if (tile) {
+    tile.classList.add("new");
+    playSound(audio.pop);
+    setTimeout(() => tile.classList.remove("new"), 300);
+  }
+  updateTile(spot.r, spot.c, 2);
+  return true;
+}
+
+function filterZero(row) {
+  return row.filter(n => n !== 0);
+}
+
+function slide(row) {
+  row = filterZero(row);
+  let mergedThisMove = false;
+  let mergedPositions = [];
+  let mergeCount = 0;
+
+  for (let i = 0; i < row.length - 1; i++) {
+    if (row[i] === row[i + 1]) {
+      row[i] = row[i] * 2;
+      
+      playSound(audio.merge);
+      
+      if (navigator.vibrate) {
+        navigator.vibrate([80, 20, 80]);
+      }
+
+      currentScore += row[i];
+      row[i + 1] = 0;
+      mergedThisMove = true;
+      mergedPositions.push(i);
+      mergeCount++;
+    }
+  }
+
+  row = filterZero(row);
+  while (row.length < 4) row.push(0);
+  return { row, merged: mergedThisMove, mergedPositions, mergeCount };
+}
+
+function arraysEqual(a, b) {
+  return a.length === b.length && a.every((v, i) => v === b[i]);
+}
+
+/* Move functions */
+function moveLeft() {
+  let moved = false;
+  let mergedCells = [];
+  mergesInCurrentMove = 0;
+  
+  for (let r = 0; r < 4; r++) {
+    const { row: newRow, mergedPositions, mergeCount } = slide(board[r]);
+    if (!arraysEqual(newRow, board[r])) moved = true;
+    board[r] = newRow;
+    
+    mergesInCurrentMove += mergeCount;
+    
+    if (mergedPositions && mergedPositions.length > 0) {
+      mergedPositions.forEach(c => {
+        mergedCells.push({ r, c });
+      });
+    }
+  }
+  
+  if (moved) {
+    refreshBoard();
+    triggerComboEffect(mergedCells, mergesInCurrentMove);
+  }
+  return moved;
+}
+
+function moveRight() {
+  let moved = false;
+  let mergedCells = [];
+  mergesInCurrentMove = 0;
+  
+  for (let r = 0; r < 4; r++) {
+    let reversed = [...board[r]].reverse();
+    const { row: slid, mergedPositions, mergeCount } = slide(reversed);
+    let newRow = slid.reverse();
+    if (!arraysEqual(newRow, board[r])) moved = true;
+    board[r] = newRow;
+    
+    mergesInCurrentMove += mergeCount;
+    
+    if (mergedPositions && mergedPositions.length > 0) {
+      mergedPositions.forEach(pos => {
+        const c = 3 - pos;
+        mergedCells.push({ r, c });
+      });
+    }
+  }
+  
+  if (moved) {
+    refreshBoard();
+    triggerComboEffect(mergedCells, mergesInCurrentMove);
+  }
+  return moved;
+}
+
+function moveUp() {
+  let moved = false;
+  let mergedCells = [];
+  mergesInCurrentMove = 0;
+  
+  for (let c = 0; c < 4; c++) {
+    const col = [board[0][c], board[1][c], board[2][c], board[3][c]];
+    const { row: newCol, mergedPositions, mergeCount } = slide(col);
+    for (let r = 0; r < 4; r++) {
+      if (board[r][c] !== newCol[r]) moved = true;
+      board[r][c] = newCol[r];
+    }
+    
+    mergesInCurrentMove += mergeCount;
+    
+    if (mergedPositions && mergedPositions.length > 0) {
+      mergedPositions.forEach(r => {
+        mergedCells.push({ r, c });
+      });
+    }
+  }
+  
+  if (moved) {
+    refreshBoard();
+    triggerComboEffect(mergedCells, mergesInCurrentMove);
+  }
+  return moved;
+}
+
+function moveDown() {
+  let moved = false;
+  let mergedCells = [];
+  mergesInCurrentMove = 0;
+  
+  for (let c = 0; c < 4; c++) {
+    const col = [board[3][c], board[2][c], board[1][c], board[0][c]];
+    const { row: slid, mergedPositions, mergeCount } = slide(col);
+    const newCol = slid.reverse();
+    for (let r = 0; r < 4; r++) {
+      if (board[r][c] !== newCol[r]) moved = true;
+      board[r][c] = newCol[r];
+    }
+    
+    mergesInCurrentMove += mergeCount;
+    
+    if (mergedPositions && mergedPositions.length > 0) {
+      mergedPositions.forEach(pos => {
+        const r = 3 - pos;
+        mergedCells.push({ r, c });
+      });
+    }
+  }
+  
+  if (moved) {
+    refreshBoard();
+    triggerComboEffect(mergedCells, mergesInCurrentMove);
+  }
+  return moved;
+}
+
+function canMove() {
+  for (let r = 0; r < 4; r++) {
+    for (let c = 0; c < 4; c++) {
+      if (board[r][c] === 0) return true;
+    }
+  }
+  
+  for (let r = 0; r < 4; r++) {
+    for (let c = 0; c < 4; c++) {
+      const current = board[r][c];
+      if (c < 3 && board[r][c + 1] === current) return true;
+      if (r < 3 && board[r + 1][c] === current) return true;
+    }
+  }
+  return false;
+}
\ No newline at end of file
diff --git a/Audio_2048.js b/Audio_2048.js
new file mode 100644
index 0000000..f564076
--- /dev/null
+++ b/Audio_2048.js
@@ -0,0 +1,168 @@
+/* ------------------------
+   2. AUDIO MANAGER
+   ------------------------ */
+const audio = {
+  bg: new Audio("Background_Music.mp3"),
+  pop: new Audio("Pop.mp3"),
+  merge: new Audio("Merge.mp3")
+};
+
+audio.bg.loop = true;
+
+// Update audio volumes based on state & sliders
+function updateAudioVolumes() {
+  audio.bg.volume = soundState.bg ? (volumeState.music / 100) : 0;
+  audio.pop.volume = soundState.pop ? (volumeState.pop / 100) : 0;
+  audio.merge.volume = soundState.merge ? (volumeState.merge / 100) : 0;
+}
+
+function tryPlayBg() {
+  if (!soundState.bg || volumeState.music === 0) return;
+  
+  audio.bg.play().catch(() => {
+    const unlock = () => {
+      if (soundState.bg && volumeState.music > 0) audio.bg.play().catch(()=>{});
+      window.removeEventListener("keydown", unlock);
+      window.removeEventListener("click", unlock);
+    };
+    window.addEventListener("keydown", unlock, { once: true });
+    window.addEventListener("click", unlock, { once: true });
+  });
+}
+
+/* Safe playSound with mute check */
+function playSound(soundObj) {
+  try {
+    if (soundObj === audio.pop && (!soundState.pop || volumeState.pop === 0)) return;
+    if (soundObj === audio.merge && (!soundState.merge || volumeState.merge === 0)) return;
+    if (soundObj === audio.bg && (!soundState.bg || volumeState.music === 0)) return;
+    
+    soundObj.currentTime = 0;
+    soundObj.play().catch(() => {});
+  } catch (e) {}
+}
+
+// Initialize Volume Sliders
+function initVolumeControl() {
+  updateAudioVolumes();
+  
+  const musicSlider = document.getElementById('vol-music');
+  const popSlider = document.getElementById('vol-pop');
+  const mergeSlider = document.getElementById('vol-merge');
+  
+  if (musicSlider) {
+    musicSlider.value = volumeState.music;
+    updateSliderFill(musicSlider, volumeState.music);
+    document.getElementById('vol-music-display').textContent = volumeState.music + '%';
+    
+    musicSlider.addEventListener('input', (e) => {
+      const val = parseInt(e.target.value);
+      volumeState.music = val;
+      audio.bg.volume = val / 100; // Direct update
+      localStorage.setItem('vol_music', val);
+      document.getElementById('vol-music-display').textContent = val + '%';
+      updateSliderFill(e.target, val);
+      updateMainSoundIcon();
+      
+      if (val > 0 && audio.bg.paused && soundState.bg) {
+        tryPlayBg();
+      } else if (val === 0) {
+        audio.bg.pause();
+      }
+    });
+  }
+  
+  if (popSlider) {
+    popSlider.value = volumeState.pop;
+    updateSliderFill(popSlider, volumeState.pop);
+    document.getElementById('vol-pop-display').textContent = volumeState.pop + '%';
+    
+    popSlider.addEventListener('input', (e) => {
+      const val = parseInt(e.target.value);
+      volumeState.pop = val;
+      audio.pop.volume = val / 100;
+      localStorage.setItem('vol_pop', val);
+      document.getElementById('vol-pop-display').textContent = val + '%';
+      updateSliderFill(e.target, val);
+      updateMainSoundIcon();
+    });
+  }
+  
+  if (mergeSlider) {
+    mergeSlider.value = volumeState.merge;
+    updateSliderFill(mergeSlider, volumeState.merge);
+    document.getElementById('vol-merge-display').textContent = volumeState.merge + '%';
+    
+    mergeSlider.addEventListener('input', (e) => {
+      const val = parseInt(e.target.value);
+      volumeState.merge = val;
+      audio.merge.volume = val / 100;
+      localStorage.setItem('vol_merge', val);
+      document.getElementById('vol-merge-display').textContent = val + '%';
+      updateSliderFill(e.target, val);
+      updateMainSoundIcon();
+    });
+  }
+  
+  updateMainSoundIcon();
+  setupVolumePanelEvents();
+}
+
+function setupVolumePanelEvents() {
+    const btnSoundMain = document.getElementById('btn-sound-main');
+    const volumePanel = document.getElementById('volume-panel');
+    
+    if (btnSoundMain && volumePanel) {
+      btnSoundMain.addEventListener('click', (e) => {
+        e.stopPropagation();
+        const isVisible = volumePanel.style.display === 'block';
+        volumePanel.style.display = isVisible ? 'none' : 'block';
+      });
+      
+      document.addEventListener('click', (e) => {
+        if (!volumePanel.contains(e.target) && !btnSoundMain.contains(e.target)) {
+          volumePanel.style.display = 'none';
+        }
+      });
+      
+      volumePanel.addEventListener('click', (e) => {
+        e.stopPropagation();
+      });
+    }
+}
+
+function updateSliderFill(slider, value) {
+  slider.style.setProperty('--value', value + '%');
+}
+
+function updateMainSoundIcon() {
+  const btnMain = document.getElementById('btn-sound-main');
+  if (!btnMain) return;
+  
+  const iconFull = btnMain.querySelector('.sound-full');
+  const iconMedium = btnMain.querySelector('.sound-medium');
+  const iconLow = btnMain.querySelector('.sound-low');
+  const iconMuted = btnMain.querySelector('.sound-muted');
+  
+  const totalVolume = volumeState.music + volumeState.pop + volumeState.merge;
+  const avgVolume = totalVolume / 3;
+  
+  if (iconFull) iconFull.style.display = 'none';
+  if (iconMedium) iconMedium.style.display = 'none';
+  if (iconLow) iconLow.style.display = 'none';
+  if (iconMuted) iconMuted.style.display = 'none';
+  
+  if (totalVolume === 0) {
+    if (iconMuted) iconMuted.style.display = 'block';
+    btnMain.classList.add('all-muted');
+  } else {
+    btnMain.classList.remove('all-muted');
+    if (avgVolume >= 60) {
+      if (iconFull) iconFull.style.display = 'block';
+    } else if (avgVolume >= 30) {
+      if (iconMedium) iconMedium.style.display = 'block';
+    } else {
+      if (iconLow) iconLow.style.display = 'block';
+    }
+  }
+}
\ No newline at end of file
diff --git a/Main_2048.js b/Main_2048.js
new file mode 100644
index 0000000..3e05a30
--- /dev/null
+++ b/Main_2048.js
@@ -0,0 +1,94 @@
+/* ------------------------
+   7. MAIN INITIALIZATION
+   ------------------------ */
+function restartGame() {
+  hideGameOver();
+  resetScore();
+  setupBoard();
+  addNewTile();
+  addNewTile();
+  refreshBoard();
+  isMoving = false;
+}
+
+function playAgain() {
+  restartGame();
+}
+
+function goHome() {
+  try { 
+    audio.bg.pause(); 
+    audio.bg.currentTime = 0; 
+  } catch (e) {}
+  window.location.href = "Homepage.html";
+}
+
+/* Event Listeners Setup */
+function setupEventListeners() {
+  // Tutorial Modal
+  const btnTutorial = document.getElementById('btn-tutorial');
+  const tutorialOverlay = document.getElementById('tutorial-overlay');
+  const closeTutorial = document.getElementById('close-tutorial');
+
+  if (btnTutorial) btnTutorial.addEventListener('click', () => tutorialOverlay.style.display = 'flex');
+  if (closeTutorial) closeTutorial.addEventListener('click', () => tutorialOverlay.style.display = 'none');
+  if (tutorialOverlay) tutorialOverlay.addEventListener('click', (e) => {
+      if (e.target === tutorialOverlay) tutorialOverlay.style.display = 'none';
+  });
+
+  // Restart & Game Over buttons
+  const btnRestart = document.getElementById('btn-restart');
+  if (btnRestart) btnRestart.addEventListener('click', restartGame);
+
+  const btnPlayAgain = document.getElementById('btn-play-again');
+  if (btnPlayAgain) btnPlayAgain.addEventListener('click', playAgain);
+  
+  const btnHome = document.getElementById('btn-home');
+  if (btnHome) btnHome.addEventListener('click', goHome);
+
+  const gameOverClose = document.getElementById('game-over-close');
+  if (gameOverClose) gameOverClose.addEventListener('click', hideGameOver);
+
+  const gameOverOverlay = document.getElementById('game-over-overlay');
+  if (gameOverOverlay) gameOverOverlay.addEventListener('click', function(e) {
+      if (e.target === this) hideGameOver();
+  });
+
+  // Sound Buttons (Mute Toggles)
+  const btnSoundBg = document.getElementById('btn-sound-bg');
+  const btnSoundPop = document.getElementById('btn-sound-pop');
+  const btnSoundMerge = document.getElementById('btn-sound-merge');
+
+  if (btnSoundBg) btnSoundBg.addEventListener('click', () => { 
+      soundState.bg = !soundState.bg; 
+      localStorage.setItem('sound_bg', soundState.bg);
+      updateAudioVolumes();
+      if(soundState.bg) tryPlayBg(); else audio.bg.pause();
+      // Tambahkan logika update tombol UI jika ada (toggle class)
+  });
+  
+  if (btnSoundPop) btnSoundPop.addEventListener('click', () => {
+      soundState.pop = !soundState.pop;
+      localStorage.setItem('sound_pop', soundState.pop);
+      updateAudioVolumes();
+  });
+
+  if (btnSoundMerge) btnSoundMerge.addEventListener('click', () => {
+      soundState.merge = !soundState.merge;
+      localStorage.setItem('sound_merge', soundState.merge);
+      updateAudioVolumes();
+  });
+}
+
+/* DOM Ready */
+document.addEventListener("DOMContentLoaded", () => {
+  updateHighScoreDisplay();
+  setupBoard();
+  addNewTile();
+  addNewTile();
+  initVolumeControl(); // Starts audio logic
+  tryPlayBg();
+  document.addEventListener("keydown", handleKey);
+  setupEventListeners();
+  checkAndShowTutorial();  
+});
\ No newline at end of file
diff --git a/User_Interface_2048.js b/User_Interface_2048.js
new file mode 100644
index 0000000..201c941
--- /dev/null
+++ b/User_Interface_2048.js
@@ -0,0 +1,126 @@
+/* ------------------------
+   4. UI MANAGER
+   ------------------------ */
+function setupBoard() {
+  board = [];
+  currentScore = 0;
+  updateScoreDisplay();
+
+  const container = document.getElementById("board");
+  if (!container) {
+    console.error("Board element not found (#board).");
+    return;
+  }
+
+  container.innerHTML = "";
+  for (let r = 0; r < 4; r++) {
+    board[r] = [];
+    for (let c = 0; c < 4; c++) {
+      board[r][c] = 0;
+      const tile = document.createElement("div");
+      tile.id = `${r}-${c}`;
+      tile.className = "tile";
+      container.appendChild(tile);
+    }
+  }
+}
+
+function updateTile(row, col, num) {
+  const tile = document.getElementById(`${row}-${col}`);
+  if (!tile) return;
+
+  tile.className = "tile";
+
+  if (num > 0) {
+    tile.textContent = num;
+    tile.classList.add("tile-" + num);
+  } else {
+    tile.textContent = "";
+  }
+}
+
+function refreshBoard() {
+  for (let r = 0; r < 4; r++) {
+    for (let c = 0; c < 4; c++) {
+      updateTile(r, c, board[r][c]);
+    }
+  }
+  updateScoreDisplay();
+}
+
+function updateScoreDisplay() {
+  const scoreEl = document.getElementById("score");
+  if (scoreEl) {
+    scoreEl.textContent = currentScore;
+  }
+  
+  if (currentScore > highScore) {
+    highScore = currentScore;
+    localStorage.setItem(storageKey, highScore); 
+    updateHighScoreDisplay();
+  }
+}
+
+function updateHighScoreDisplay() {
+  const highScoreEl = document.getElementById('high-score');
+  if (highScoreEl) {
+    highScoreEl.textContent = highScore;
+  }
+}
+
+function resetScore() {
+  currentScore = 0;
+  updateScoreDisplay();
+}
+
+function checkAndShowTutorial() {
+  const showTutorial = sessionStorage.getItem("showTutorial");
+  const loggedInUser = sessionStorage.getItem("loggedInUser");
+  
+  if (showTutorial === "true" && loggedInUser) {
+    setTimeout(() => {
+      const tutorialOverlay = document.getElementById('tutorial-overlay');
+      if (tutorialOverlay) {
+        tutorialOverlay.style.display = 'flex';
+      }
+      sessionStorage.setItem("showTutorial", "false");
+    }, 500);
+  }
+}
+
+function showGameOver() {
+  const finalScore = currentScore;
+
+  if (typeof saveScore === 'function') {
+      console.log("Mengirim skor ke database:", finalScore);
+      saveScore(finalScore);
+  } else {
+      console.error("Fungsi saveScore tidak ditemukan! Pastikan Score_Request.js sudah diload.");
+  }
+
+  const isNewHighScore = finalScore >= highScore && finalScore > 0;
+  
+  const finalScoreEl = document.getElementById('final-score');
+  if (finalScoreEl) finalScoreEl.textContent = finalScore;
+  
+  const newHighScoreBadge = document.getElementById('new-high-score-badge');
+  const highScoreDisplay = document.getElementById('high-score-display');
+  
+  if (isNewHighScore) {
+    if (newHighScoreBadge) newHighScoreBadge.style.display = 'inline-block';
+    if (highScoreDisplay) highScoreDisplay.style.display = 'none';
+  } else {
+    if (newHighScoreBadge) newHighScoreBadge.style.display = 'none';
+    if (highScoreDisplay) highScoreDisplay.style.display = 'block';
+    const modalHighScore = document.getElementById('modal-high-score');
+    if (modalHighScore) modalHighScore.textContent = highScore;
+  }
+  
+  const gameOverOverlay = document.getElementById('game-over-overlay');
+  if (gameOverOverlay) gameOverOverlay.style.display = 'flex';
+}
+
+function hideGameOver() {
+  const gameOverOverlay = document.getElementById('game-over-overlay');
+  if (gameOverOverlay) gameOverOverlay.style.display = 'none';
+}
\ No newline at end of file
diff --git a/Visual_Effects_2048.js b/Visual_Effects_2048.js
new file mode 100644
index 0000000..e09c380
--- /dev/null
+++ b/Visual_Effects_2048.js
@@ -0,0 +1,151 @@
+/* ------------------------
+   3. VISUAL EFFECTS
+   ------------------------ */
+function triggerComboEffect(mergedCells, comboCount) {
+  if (mergedCells.length === 0) return;
+  
+  mergedCells.forEach(cell => {
+    const tile = document.getElementById(`${cell.r}-${cell.c}`);
+    if (!tile) return;
+    
+    tile.classList.add('merge');
+    setTimeout(() => tile.classList.remove('merge'), 300);
+    
+    createParticleBurst(tile);
+    
+    tile.style.boxShadow = '0 0 40px currentColor';
+    setTimeout(() => {
+      tile.style.boxShadow = '';
+    }, 300);
+    
+    const rect = tile.getBoundingClientRect();
+    const centerX = rect.left + rect.width / 2;
+    const centerY = rect.top + rect.height / 2;
+    const tileValue = parseInt(tile.textContent);
+    createScorePopup(centerX, centerY, tileValue);
+  });
+  
+  if (comboCount >= 2) {
+    showComboPopup(comboCount);
+  }
+}
+
+function showComboPopup(comboCount) {
+  const board = document.getElementById('board');
+  if (!board) return;
+  
+  const rect = board.getBoundingClientRect();
+  const centerX = rect.left + rect.width / 2;
+  const centerY = rect.top + rect.height / 2;
+  
+  const popup = document.createElement('div');
+  popup.className = 'combo-popup';
+  popup.style.left = centerX + 'px';
+  popup.style.top = centerY + 'px';
+  popup.style.position = 'fixed';
+  popup.style.fontWeight = '900';
+  popup.style.pointerEvents = 'none';
+  popup.style.zIndex = '9999';
+  popup.style.transform = 'translate(-50%, -50%)';
+  popup.style.textTransform = 'uppercase';
+  popup.style.letterSpacing = '3px';
+  
+  if (comboCount === 2) {
+    popup.textContent = 'COMBO x2!';
+    popup.style.fontSize = '36px';
+    popup.style.color = '#00ff99';
+    popup.style.textShadow = '0 0 30px rgba(0, 255, 153, 1), 0 0 50px rgba(0, 255, 153, 0.5)';
+  } else if (comboCount === 3) {
+    popup.textContent = 'AMAZING x3!';
+    popup.style.fontSize = '42px';
+    popup.style.color = '#ff00ff';
+    popup.style.textShadow = '0 0 35px rgba(255, 0, 255, 1), 0 0 60px rgba(255, 0, 255, 0.6)';
+  } else if (comboCount >= 4) {
+    popup.textContent = 'PERFECT x' + comboCount + '!';
+    popup.style.fontSize = '48px';
+    popup.style.color = '#ffd700';
+    popup.style.textShadow = '0 0 40px rgba(255, 215, 0, 1), 0 0 70px rgba(255, 215, 0, 0.7)';
+  }
+  
+  document.body.appendChild(popup);
+  
+  popup.animate([
+    { transform: 'translate(-50%, -50%) scale(0.3) rotate(-10deg)', opacity: 0 },
+    { transform: 'translate(-50%, -50%) scale(1.3) rotate(5deg)', opacity: 1, offset: 0.3 },
+    { transform: 'translate(-50%, -50%) scale(1.1) rotate(-2deg)', opacity: 1, offset: 0.6 },
+    { transform: 'translate(-50%, -50%) scale(0.8) rotate(0deg)', opacity: 0 }
+  ], {
+    duration: 1200,
+    easing: 'cubic-bezier(0.34, 1.56, 0.64, 1)'
+  }).onfinish = () => popup.remove();
+}
+
+function createParticleBurst(tileElement) {
+  const rect = tileElement.getBoundingClientRect();
+  const centerX = rect.left + rect.width / 2;
+  const centerY = rect.top + rect.height / 2;
+  
+  const tileValue = parseInt(tileElement.textContent);
+  const tileColor = getTileColor(tileValue);
+  
+  const particleCount = 8 + Math.floor(Math.random() * 5);
+  
+  for (let i = 0; i < particleCount; i++) {
+    const particle = document.createElement('div');
+    particle.className = 'merge-particle';
+    particle.style.left = centerX + 'px';
+    particle.style.top = centerY + 'px';
+    particle.style.background = tileColor;
+    
+    document.body.appendChild(particle);
+    
+    const angle = (Math.PI * 2 * i) / particleCount + (Math.random() - 0.5) * 0.5;
+    const velocity = 60 + Math.random() * 40;
+    const tx = Math.cos(angle) * velocity;
+    const ty = Math.sin(angle) * velocity;
+    
+    particle.animate([
+      { transform: 'translate(0, 0) scale(1)', opacity: 1 },
+      { transform: `translate(${tx}px, ${ty}px) scale(0)`, opacity: 0 }
+    ], {
+      duration: 500 + Math.random() * 200,
+      easing: 'cubic-bezier(0.25, 0.46, 0.45, 0.94)'
+    }).onfinish = () => particle.remove();
+  }
+}
+
+function createScorePopup(x, y, score) {
+  const popup = document.createElement('div');
+  popup.className = 'score-popup';
+  popup.textContent = '+' + score;
+  popup.style.left = x + 'px';
+  popup.style.top = y + 'px';
+  popup.style.position = 'fixed';
+  popup.style.fontSize = '24px';
+  popup.style.fontWeight = '900';
+  popup.style.color = '#ffd700';
+  popup.style.textShadow = '0 0 20px rgba(255, 215, 0, 0.8)';
+  popup.style.pointerEvents = 'none';
+  popup.style.zIndex = '9999';
+  popup.style.transform = 'translate(-50%, -50%)';
+  
+  document.body.appendChild(popup);
+  
+  popup.animate([
+    { transform: 'translate(-50%, -50%) scale(0.5)', opacity: 0 },
+    { transform: 'translate(-50%, -70px) scale(1.2)', opacity: 1, offset: 0.3 },
+    { transform: 'translate(-50%, -120px) scale(1)', opacity: 0 }
+  ], {
+    duration: 1000,
+    easing: 'cubic-bezier(0.34, 1.56, 0.64, 1)'
+  }).onfinish = () => popup.remove();
+}
+
+function getTileColor(value) {
+  const colors = {
+    2: '#00eaff', 4: '#00ff99', 8: '#ff00ff', 16: '#ff0066',
+    32: '#ffaa00', 64: '#ff0000', 128: '#5f00ff', 256: '#00ffea',
+    512: '#ff00aa', 1024: '#00ffaa', 2048: '#ffd700'
+  };
+  return colors[value] || '#00eaff';
+}
\ No newline at end of file