/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");

/**** 
* Classes
****/ 
var Gem = Container.expand(function () {
	var self = Container.call(this);
	self.gemType = 0;
	self.gridX = 0;
	self.gridY = 0;
	self.graphics = null;
	self.isSelected = false;
	self.isMatched = false;
	self.isFalling = false;
	self.isBomb = false;
	self.init = function (type, gx, gy) {
		self.gemType = type;
		self.gridX = gx;
		self.gridY = gy;
		var gemTypes = ['gemRed', 'gemBlue', 'gemGreen', 'gemYellow', 'gemPurple', 'gemOrange', 'gemBomb'];
		if (type === 6) {
			self.isBomb = true;
		}
		self.graphics = self.attachAsset(gemTypes[type], {
			anchorX: 0.5,
			anchorY: 0.5
		});
		self.updatePosition();
	};
	self.updatePosition = function () {
		var startX = (2048 - GRID_SIZE * CELL_SIZE) / 2;
		var startY = 400;
		self.x = startX + self.gridX * CELL_SIZE + CELL_SIZE / 2;
		self.y = startY + self.gridY * CELL_SIZE + CELL_SIZE / 2;
	};
	self.setSelected = function (selected) {
		self.isSelected = selected;
		if (selected) {
			self.graphics.alpha = 0.7;
			tween(self.graphics, {
				scaleX: 1.2,
				scaleY: 1.2
			}, {
				duration: 200
			});
		} else {
			self.graphics.alpha = 1.0;
			tween(self.graphics, {
				scaleX: 1.0,
				scaleY: 1.0
			}, {
				duration: 200
			});
		}
	};
	self.fallTo = function (newY, callback) {
		self.isFalling = true;
		self.gridY = newY;
		var newPosY = 400 + newY * CELL_SIZE + CELL_SIZE / 2;
		tween(self, {
			y: newPosY
		}, {
			duration: 300,
			easing: tween.bounceOut,
			onFinish: function onFinish() {
				self.isFalling = false;
				if (callback) callback();
			}
		});
	};
	self.destroy = function () {
		self.isMatched = true;
		tween(self.graphics, {
			alpha: 0,
			scaleX: 0.1,
			scaleY: 0.1
		}, {
			duration: 300,
			onFinish: function onFinish() {
				if (self.parent) {
					self.parent.removeChild(self);
				}
			}
		});
	};
	self.explodeBomb = function () {
		if (!self.isBomb) return;
		// Create explosion effect
		tween(self.graphics, {
			scaleX: 2,
			scaleY: 2,
			alpha: 0
		}, {
			duration: 300,
			onFinish: function onFinish() {
				if (self.parent) {
					self.parent.removeChild(self);
				}
			}
		});
		// Mark gems in 3x3 area for destruction
		var gemsToDestroy = [];
		for (var dx = -1; dx <= 1; dx++) {
			for (var dy = -1; dy <= 1; dy++) {
				var targetX = self.gridX + dx;
				var targetY = self.gridY + dy;
				if (targetX >= 0 && targetX < GRID_SIZE && targetY >= 0 && targetY < GRID_SIZE) {
					if (grid[targetX][targetY] && !grid[targetX][targetY].isMatched) {
						gemsToDestroy.push({
							x: targetX,
							y: targetY
						});
					}
				}
			}
		}
		// Destroy gems with delay for visual effect
		for (var i = 0; i < gemsToDestroy.length; i++) {
			(function (destroyData) {
				LK.setTimeout(function () {
					if (grid[destroyData.x][destroyData.y]) {
						grid[destroyData.x][destroyData.y].destroy();
						grid[destroyData.x][destroyData.y] = null;
					}
				}, i * 50);
			})(gemsToDestroy[i]);
		}
		// Add explosion score
		var explosionScore = gemsToDestroy.length * 50 * multiplier;
		score += explosionScore;
		updateScore();
		// Play explosion sound
		LK.getSound('explosion').play();
		// Wait for all destruction then cascade
		LK.setTimeout(function () {
			cascadeGems();
		}, 500);
	};
	self.down = function (x, y, obj) {
		if (!self.isFalling && !isProcessing) {
			if (self.isBomb) {
				isProcessing = true;
				self.explodeBomb();
			} else {
				selectGem(self);
			}
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x1a1a2e
});

/**** 
* Game Code
****/ 
var GRID_SIZE = 8;
var CELL_SIZE = 200;
var GEM_TYPES = 6;
var BOMB_TYPE = 6;
var grid = [];
var selectedGem = null;
var score = 0;
var multiplier = 1;
var isProcessing = false;
var cascadeCount = 0;
// Initialize score display
var scoreTxt = new Text2('Score: 0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var multiplierTxt = new Text2('Multiplier: x1', {
	size: 60,
	fill: 0xFFFF00
});
multiplierTxt.anchor.set(0.5, 0);
multiplierTxt.y = 100;
LK.gui.top.addChild(multiplierTxt);
// Initialize grid
function initializeGrid() {
	var startX = (2048 - GRID_SIZE * CELL_SIZE) / 2;
	var startY = 400;
	// Create background cells
	for (var x = 0; x < GRID_SIZE; x++) {
		for (var y = 0; y < GRID_SIZE; y++) {
			var cell = LK.getAsset('gridCell', {
				anchorX: 0,
				anchorY: 0,
				alpha: 0.3
			});
			cell.x = startX + x * CELL_SIZE;
			cell.y = startY + y * CELL_SIZE;
			game.addChild(cell);
		}
	}
	// Initialize grid array
	for (var x = 0; x < GRID_SIZE; x++) {
		grid[x] = [];
		for (var y = 0; y < GRID_SIZE; y++) {
			grid[x][y] = null;
		}
	}
	// Fill grid with gems
	for (var x = 0; x < GRID_SIZE; x++) {
		for (var y = 0; y < GRID_SIZE; y++) {
			createGem(x, y);
		}
	}
	// Remove initial matches
	removeInitialMatches();
}
function createGem(x, y) {
	var gem = new Gem();
	var gemType = Math.floor(Math.random() * GEM_TYPES);
	gem.init(gemType, x, y);
	grid[x][y] = gem;
	game.addChild(gem);
	return gem;
}
function removeInitialMatches() {
	var hasMatches = true;
	var attempts = 0;
	while (hasMatches && attempts < 50) {
		hasMatches = false;
		attempts++;
		for (var x = 0; x < GRID_SIZE; x++) {
			for (var y = 0; y < GRID_SIZE; y++) {
				if (grid[x][y] && hasMatchAt(x, y)) {
					// Regenerate this gem
					var oldGem = grid[x][y];
					if (oldGem.parent) {
						oldGem.parent.removeChild(oldGem);
					}
					createGem(x, y);
					hasMatches = true;
				}
			}
		}
	}
}
function selectGem(gem) {
	if (selectedGem === gem) {
		// Deselect
		selectedGem.setSelected(false);
		selectedGem = null;
		return;
	}
	if (selectedGem === null) {
		// First selection
		selectedGem = gem;
		gem.setSelected(true);
	} else {
		// Second selection - check if adjacent
		if (areAdjacent(selectedGem, gem)) {
			swapGems(selectedGem, gem);
		}
		selectedGem.setSelected(false);
		selectedGem = null;
	}
}
function areAdjacent(gem1, gem2) {
	var dx = Math.abs(gem1.gridX - gem2.gridX);
	var dy = Math.abs(gem1.gridY - gem2.gridY);
	return dx === 1 && dy === 0 || dx === 0 && dy === 1;
}
function swapGems(gem1, gem2) {
	if (isProcessing) return;
	isProcessing = true;
	// Store positions
	var tempX = gem1.gridX;
	var tempY = gem1.gridY;
	// Update grid positions
	gem1.gridX = gem2.gridX;
	gem1.gridY = gem2.gridY;
	gem2.gridX = tempX;
	gem2.gridY = tempY;
	// Update grid array
	grid[gem1.gridX][gem1.gridY] = gem1;
	grid[gem2.gridX][gem2.gridY] = gem2;
	// Animate swap
	var gem1NewX = gem1.x;
	var gem1NewY = gem1.y;
	gem1.updatePosition();
	var gem2NewX = gem2.x;
	var gem2NewY = gem2.y;
	gem2.updatePosition();
	gem1.x = gem2NewX;
	gem1.y = gem2NewY;
	gem2.x = gem1NewX;
	gem2.y = gem1NewY;
	tween(gem1, {
		x: gem1NewX,
		y: gem1NewY
	}, {
		duration: 300
	});
	tween(gem2, {
		x: gem2NewX,
		y: gem2NewY
	}, {
		duration: 300,
		onFinish: function onFinish() {
			checkForMatches();
		}
	});
}
function hasMatchAt(x, y) {
	if (!grid[x] || !grid[x][y]) return false;
	var gemType = grid[x][y].gemType;
	// Check horizontal
	var hCount = 1;
	// Check left
	for (var i = x - 1; i >= 0 && grid[i][y] && grid[i][y].gemType === gemType; i--) {
		hCount++;
	}
	// Check right
	for (var i = x + 1; i < GRID_SIZE && grid[i][y] && grid[i][y].gemType === gemType; i++) {
		hCount++;
	}
	if (hCount >= 3) return true;
	// Check vertical
	var vCount = 1;
	// Check up
	for (var i = y - 1; i >= 0 && grid[x][i] && grid[x][i].gemType === gemType; i--) {
		vCount++;
	}
	// Check down
	for (var i = y + 1; i < GRID_SIZE && grid[x][i] && grid[x][i].gemType === gemType; i++) {
		vCount++;
	}
	return vCount >= 3;
}
function checkForMatches() {
	var matches = [];
	// Find all matches
	for (var x = 0; x < GRID_SIZE; x++) {
		for (var y = 0; y < GRID_SIZE; y++) {
			if (grid[x][y] && hasMatchAt(x, y)) {
				matches.push({
					x: x,
					y: y
				});
			}
		}
	}
	if (matches.length > 0) {
		cascadeCount++;
		LK.getSound('match').play();
		// Calculate score
		var points = matches.length * 10 * multiplier * cascadeCount;
		score += points;
		updateScore();
		// Create bomb if match is 4 or more gems
		var shouldCreateBomb = matches.length >= 4;
		var bombPosition = null;
		if (shouldCreateBomb && matches.length > 0) {
			bombPosition = matches[Math.floor(Math.random() * matches.length)];
		}
		// Mark matched gems for destruction
		for (var i = 0; i < matches.length; i++) {
			var match = matches[i];
			if (grid[match.x][match.y]) {
				grid[match.x][match.y].destroy();
				grid[match.x][match.y] = null;
			}
		}
		// Create bomb after destruction
		if (shouldCreateBomb && bombPosition) {
			LK.setTimeout(function () {
				if (grid[bombPosition.x][bombPosition.y] === null) {
					var bomb = new Gem();
					bomb.init(BOMB_TYPE, bombPosition.x, bombPosition.y);
					grid[bombPosition.x][bombPosition.y] = bomb;
					game.addChild(bomb);
					// Animate bomb creation
					bomb.graphics.scaleX = 0;
					bomb.graphics.scaleY = 0;
					tween(bomb.graphics, {
						scaleX: 1,
						scaleY: 1
					}, {
						duration: 300,
						easing: tween.bounceOut
					});
				}
			}, 200);
		}
		// Wait for destruction animation then cascade
		LK.setTimeout(function () {
			cascadeGems();
		}, 400);
	} else {
		cascadeCount = 0;
		isProcessing = false;
	}
}
function cascadeGems() {
	var needsCascade = false;
	var fallPromises = 0;
	// Process each column from left to right
	for (var x = 0; x < GRID_SIZE; x++) {
		// Compact the column - move all existing gems down to fill gaps
		var compactedGems = [];
		for (var y = 0; y < GRID_SIZE; y++) {
			if (grid[x][y] !== null) {
				compactedGems.push(grid[x][y]);
				grid[x][y] = null;
			}
		}
		// Place compacted gems at the bottom of the column
		var startY = GRID_SIZE - compactedGems.length;
		for (var i = 0; i < compactedGems.length; i++) {
			var gem = compactedGems[i];
			var newY = startY + i;
			var oldY = gem.gridY;
			if (oldY !== newY) {
				needsCascade = true;
				grid[x][newY] = gem;
				fallPromises++;
				gem.fallTo(newY, function () {
					fallPromises--;
					if (fallPromises === 0) {
						fillEmptySpaces();
					}
				});
			} else {
				// Gem doesn't need to move
				grid[x][newY] = gem;
			}
		}
	}
	if (!needsCascade) {
		fillEmptySpaces();
	} else {
		LK.getSound('cascade').play();
	}
}
function fillEmptySpaces() {
	var newGemsCreated = 0;
	for (var x = 0; x < GRID_SIZE; x++) {
		for (var y = 0; y < GRID_SIZE; y++) {
			if (grid[x][y] === null) {
				createGem(x, y);
				newGemsCreated++;
				// Start gem above the screen and animate it falling
				var startY = 400 - newGemsCreated * CELL_SIZE;
				grid[x][y].y = startY;
				tween(grid[x][y], {
					y: 400 + y * CELL_SIZE + CELL_SIZE / 2
				}, {
					duration: 500 + newGemsCreated * 50,
					easing: tween.bounceOut
				});
			}
		}
	}
	// Check for new matches after a delay
	LK.setTimeout(function () {
		checkForMatches();
	}, 600);
}
function updateScore() {
	scoreTxt.setText('Score: ' + score);
	// Update multiplier based on score
	var newMultiplier = 1;
	if (score >= 2500) newMultiplier = 5;else if (score >= 1000) newMultiplier = 4;else if (score >= 500) newMultiplier = 3;else if (score >= 100) newMultiplier = 2;
	if (newMultiplier !== multiplier) {
		multiplier = newMultiplier;
		multiplierTxt.setText('Multiplier: x' + multiplier);
		LK.effects.flashScreen(0x00ff00, 500);
	}
	// Win condition
	if (score >= 5000) {
		LK.showYouWin();
	}
}
// Initialize the game
initializeGrid();
updateScore();
game.update = function () {
	// Game loop - handle any continuous updates here
};

===================================================================
--- original.js
+++ change.js
@@ -408,46 +408,36 @@
 	var needsCascade = false;
 	var fallPromises = 0;
 	// Process each column from left to right
 	for (var x = 0; x < GRID_SIZE; x++) {
-		var gemsToMove = [];
-		var targetPositions = [];
-		// Find all gems that need to fall in this column
-		for (var y = GRID_SIZE - 1; y >= 0; y--) {
+		// Compact the column - move all existing gems down to fill gaps
+		var compactedGems = [];
+		for (var y = 0; y < GRID_SIZE; y++) {
 			if (grid[x][y] !== null) {
-				// Find the lowest available position for this gem
-				var targetY = y;
-				while (targetY + 1 < GRID_SIZE && grid[x][targetY + 1] === null) {
-					targetY++;
-				}
-				// If gem needs to move down
-				if (targetY !== y) {
-					gemsToMove.push({
-						gem: grid[x][y],
-						fromY: y,
-						toY: targetY
-					});
-					needsCascade = true;
-				}
+				compactedGems.push(grid[x][y]);
+				grid[x][y] = null;
 			}
 		}
-		// Move gems to their new positions
-		for (var i = 0; i < gemsToMove.length; i++) {
-			var moveData = gemsToMove[i];
-			var gem = moveData.gem;
-			var fromY = moveData.fromY;
-			var toY = moveData.toY;
-			// Update grid array
-			grid[x][fromY] = null;
-			grid[x][toY] = gem;
-			// Animate the fall
-			fallPromises++;
-			gem.fallTo(toY, function () {
-				fallPromises--;
-				if (fallPromises === 0) {
-					fillEmptySpaces();
-				}
-			});
+		// Place compacted gems at the bottom of the column
+		var startY = GRID_SIZE - compactedGems.length;
+		for (var i = 0; i < compactedGems.length; i++) {
+			var gem = compactedGems[i];
+			var newY = startY + i;
+			var oldY = gem.gridY;
+			if (oldY !== newY) {
+				needsCascade = true;
+				grid[x][newY] = gem;
+				fallPromises++;
+				gem.fallTo(newY, function () {
+					fallPromises--;
+					if (fallPromises === 0) {
+						fillEmptySpaces();
+					}
+				});
+			} else {
+				// Gem doesn't need to move
+				grid[x][newY] = gem;
+			}
 		}
 	}
 	if (!needsCascade) {
 		fillEmptySpaces();
@@ -455,18 +445,21 @@
 		LK.getSound('cascade').play();
 	}
 }
 function fillEmptySpaces() {
+	var newGemsCreated = 0;
 	for (var x = 0; x < GRID_SIZE; x++) {
 		for (var y = 0; y < GRID_SIZE; y++) {
 			if (grid[x][y] === null) {
 				createGem(x, y);
-				// Animate gem falling from top
-				grid[x][y].y = -200;
+				newGemsCreated++;
+				// Start gem above the screen and animate it falling
+				var startY = 400 - newGemsCreated * CELL_SIZE;
+				grid[x][y].y = startY;
 				tween(grid[x][y], {
 					y: 400 + y * CELL_SIZE + CELL_SIZE / 2
 				}, {
-					duration: 500,
+					duration: 500 + newGemsCreated * 50,
 					easing: tween.bounceOut
 				});
 			}
 		}