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

/**** 
* Classes
****/ 
var Card = Container.expand(function (isWinning) {
	var self = Container.call(this);
	self.isWinning = isWinning || false;
	self.isFlipped = false;
	self.isClickable = true;
	// Create card back (visible initially)
	var cardBack = self.attachAsset('cardBack', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Create card front (hidden initially)
	var cardFront = self.attachAsset(self.isWinning ? 'cardFront' : 'wrongCard', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0
	});
	self.flip = function () {
		if (!self.isClickable || self.isFlipped) return;
		self.isFlipped = true;
		self.isClickable = false;
		LK.getSound('cardFlip').play();
		// Flip animation
		tween(cardBack, {
			scaleX: 0
		}, {
			duration: 150,
			onFinish: function onFinish() {
				cardBack.alpha = 0;
				cardFront.alpha = 1;
				cardFront.scaleX = 0;
				tween(cardFront, {
					scaleX: 1
				}, {
					duration: 150
				});
			}
		});
		// Trigger game logic
		if (self.isWinning) {
			LK.getSound('correct').play();
			game.onCorrectCard();
		} else {
			LK.getSound('wrong').play();
			game.onWrongCard();
		}
	};
	self.down = function (x, y, obj) {
		self.flip();
	};
	return self;
});

/**** 
* Initialize Game
****/ 
// Assets will be initialized automatically when needed
// Classes will be defined here
var game = new LK.Game({
	backgroundColor: 0x2c3e50
});

/**** 
* Game Code
****/ 
// Game variables
var currentLevel = 1;
var maxLevel = 9;
var cards = [];
var gameState = 'playing'; // 'playing', 'won', 'lost'
// UI elements
var levelText = new Text2('Level: 1', {
	size: 80,
	fill: 0xFFFFFF
});
levelText.anchor.set(0.5, 0);
LK.gui.top.addChild(levelText);
var instructionText = new Text2('Find the green card!', {
	size: 60,
	fill: 0xFFFFFF
});
instructionText.anchor.set(0.5, 0);
instructionText.y = 100;
LK.gui.top.addChild(instructionText);
function getCardsForLevel(level) {
	if (level <= 3) return 3;
	if (level <= 6) return 6;
	return 9;
}
function createLevel() {
	// Clear existing cards
	for (var i = 0; i < cards.length; i++) {
		cards[i].destroy();
	}
	cards = [];
	var numCards = getCardsForLevel(currentLevel);
	var winningIndex = Math.floor(Math.random() * numCards);
	// Calculate card positions
	var cardSpacing = 250;
	var cardsPerRow = numCards <= 3 ? 3 : 3;
	var rows = Math.ceil(numCards / cardsPerRow);
	var startX = 1024 - (cardsPerRow - 1) * cardSpacing / 2;
	var startY = 1366 - (rows - 1) * 350 / 2;
	// Create cards
	for (var i = 0; i < numCards; i++) {
		var isWinning = i === winningIndex;
		var card = new Card(isWinning);
		var row = Math.floor(i / cardsPerRow);
		var col = i % cardsPerRow;
		card.x = startX + col * cardSpacing;
		card.y = startY + row * 350;
		cards.push(card);
		game.addChild(card);
	}
	// Update UI
	levelText.setText('Level: ' + currentLevel);
	gameState = 'playing';
	instructionText.setText('Remember this card...');
}
game.onCorrectCard = function () {
	gameState = 'won';
	// Disable all cards
	for (var i = 0; i < cards.length; i++) {
		cards[i].isClickable = false;
	}
	if (currentLevel >= maxLevel) {
		// Game complete
		instructionText.setText('Congratulations! You won!');
		LK.setTimeout(function () {
			LK.showYouWin();
		}, 1500);
	} else {
		// Next level
		instructionText.setText('Correct! Next level...');
		LK.setTimeout(function () {
			currentLevel++;
			createLevel();
			// Show winning card then shuffle for next level
			LK.setTimeout(function () {
				showWinningCard();
			}, 500);
		}, 1500);
	}
};
game.onWrongCard = function () {
	gameState = 'lost';
	// Disable all cards
	for (var i = 0; i < cards.length; i++) {
		cards[i].isClickable = false;
	}
	instructionText.setText('Wrong choice! Game Over');
	LK.setTimeout(function () {
		LK.showGameOver();
	}, 1500);
};
function showWinningCard() {
	// Find the winning card
	var winningCard = null;
	for (var i = 0; i < cards.length; i++) {
		if (cards[i].isWinning) {
			winningCard = cards[i];
			break;
		}
	}
	if (winningCard) {
		// Disable all cards during preview
		for (var i = 0; i < cards.length; i++) {
			cards[i].isClickable = false;
		}
		// Show the winning card briefly
		var cardBack = winningCard.children[0]; // cardBack asset
		var cardFront = winningCard.children[1]; // cardFront asset
		// Flip to show winning card
		tween(cardBack, {
			scaleX: 0
		}, {
			duration: 150,
			onFinish: function onFinish() {
				cardBack.alpha = 0;
				cardFront.alpha = 1;
				cardFront.scaleX = 0;
				tween(cardFront, {
					scaleX: 1
				}, {
					duration: 150,
					onFinish: function onFinish() {
						// Wait 2 seconds then flip back and shuffle
						LK.setTimeout(function () {
							tween(cardFront, {
								scaleX: 0
							}, {
								duration: 150,
								onFinish: function onFinish() {
									cardFront.alpha = 0;
									cardBack.alpha = 1;
									cardBack.scaleX = 0;
									tween(cardBack, {
										scaleX: 1
									}, {
										duration: 150,
										onFinish: function onFinish() {
											shuffleCards();
										}
									});
								}
							});
						}, 2000);
					}
				});
			}
		});
	}
}
function shuffleCards() {
	// Create shuffle animation by moving cards around
	var positions = [];
	for (var i = 0; i < cards.length; i++) {
		positions.push({
			x: cards[i].x,
			y: cards[i].y
		});
	}
	// Shuffle positions array
	for (var i = positions.length - 1; i > 0; i--) {
		var j = Math.floor(Math.random() * (i + 1));
		var temp = positions[i];
		positions[i] = positions[j];
		positions[j] = temp;
	}
	// Animate cards to new positions
	var completedAnimations = 0;
	for (var i = 0; i < cards.length; i++) {
		tween(cards[i], {
			x: positions[i].x,
			y: positions[i].y
		}, {
			duration: 500,
			easing: tween.easeInOut,
			onFinish: function onFinish() {
				completedAnimations++;
				if (completedAnimations === cards.length) {
					// Re-enable cards after shuffle
					for (var j = 0; j < cards.length; j++) {
						cards[j].isClickable = true;
					}
					instructionText.setText('Find the green card!');
				}
			}
		});
	}
}
// Play background music
LK.playMusic('bgMusic');
// Initialize first level
createLevel();
// Show winning card then shuffle
LK.setTimeout(function () {
	showWinningCard();
}, 500);

===================================================================
--- original.js
+++ change.js
@@ -255,8 +255,10 @@
 			}
 		});
 	}
 }
+// Play background music
+LK.playMusic('bgMusic');
 // Initialize first level
 createLevel();
 // Show winning card then shuffle
 LK.setTimeout(function () {