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

/**** 
* Classes
****/ 
var Card = Container.expand(function (pairId) {
	var self = Container.call(this);
	self.pairId = pairId;
	self.isFlipped = false;
	self.isMatched = false;
	self.back = self.attachAsset('card_back', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.face = self.attachAsset('card_face_' + pairId, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.face.visible = false;
	// Public methods must be defined before they are called.
	self.flipUp = function (onComplete) {
		if (self.isFlipped) return;
		self.isFlipped = true;
		LK.getSound('flip').play();
		tween(self, {
			scaleX: 0
		}, {
			duration: 150,
			easing: tween.easeIn,
			onFinish: function onFinish() {
				self.back.visible = false;
				self.face.visible = true;
				tween(self, {
					scaleX: 1
				}, {
					duration: 150,
					easing: tween.easeOut,
					onFinish: onComplete
				});
			}
		});
	};
	self.flipDown = function (onComplete) {
		if (!self.isFlipped) return;
		self.isFlipped = false;
		tween(self, {
			scaleX: 0
		}, {
			duration: 150,
			easing: tween.easeIn,
			onFinish: function onFinish() {
				self.face.visible = false;
				self.back.visible = true;
				tween(self, {
					scaleX: 1
				}, {
					duration: 150,
					easing: tween.easeOut,
					onFinish: onComplete
				});
			}
		});
	};
	self.matchFound = function (onComplete) {
		self.isMatched = true;
		tween(self, {
			alpha: 0,
			scaleX: 1.2,
			scaleY: 1.2
		}, {
			duration: 400,
			easing: tween.easeIn,
			onFinish: onComplete
		});
	};
	self.down = function () {
		handleCardFlip(self);
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x2c3e50 // Dark slate blue background
});

/**** 
* Game Code
****/ 
//LK Engine will automatically create assets based on usage.
//Defining 8 pairs of cards + 1 card back.
// Red
// Blue
// Green
// Yellow
// Magenta
// Cyan
// Orange
// Purple
var scoreTxt = new Text2('Score: 0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
LK.setScore(0); // Initialize score
// --- Game Constants ---
var COLS = 4;
var ROWS = 4;
var TOTAL_PAIRS = COLS * ROWS / 2;
var TOTAL_CARD_FACES = 15;
var CARD_WIDTH = 350;
var CARD_HEIGHT = 350;
var MARGIN = 60;
var gridWidth = COLS * (CARD_WIDTH + MARGIN) - MARGIN;
var gridHeight = ROWS * (CARD_HEIGHT + MARGIN) - MARGIN;
var startX = (2048 - gridWidth) / 2 + CARD_WIDTH / 2;
var startY = (2732 - gridHeight) / 2 + CARD_HEIGHT / 2;
// --- Global UI and Game State Variables ---
var startScreenContainer, boardSizeContainer, leaderboardContainer, gameContainer, victoryScreenContainer;
var cards = [];
var flippedCards = [];
var matchedPairs = 0;
var canPlay = true;
var streakCount = 0;
var maxStreak = 0;
// --- Screen Management ---
function showStartScreen() {
	if (leaderboardContainer) leaderboardContainer.visible = false;
	if (gameContainer) gameContainer.visible = false;
	if (victoryScreenContainer) victoryScreenContainer.visible = false;
	if (!startScreenContainer) {
		startScreenContainer = game.addChild(new Container());
		var title = new Text2('Memory Match', {
			size: 150,
			fill: 0xFFFFFF
		});
		title.anchor.set(0.5, 0.5);
		title.x = 2048 / 2;
		title.y = 2732 / 2 - 400;
		startScreenContainer.addChild(title);
		var playButton = new Text2('Play', {
			size: 100,
			fill: 0xFFFFFF
		});
		playButton.anchor.set(0.5, 0.5);
		playButton.x = 2048 / 2;
		playButton.y = 2732 / 2;
		playButton.down = function () {
			showBoardSizeSelection();
		};
		startScreenContainer.addChild(playButton);
		var leaderboardButton = new Text2('Leaderboard', {
			size: 100,
			fill: 0xFFFFFF
		});
		leaderboardButton.anchor.set(0.5, 0.5);
		leaderboardButton.x = 2048 / 2;
		leaderboardButton.y = 2732 / 2 + 200;
		leaderboardButton.down = function () {
			showLeaderboard();
		};
		startScreenContainer.addChild(leaderboardButton);
	}
	startScreenContainer.visible = true;
	scoreTxt.visible = false;
}
function showBoardSizeSelection() {
	if (startScreenContainer) startScreenContainer.visible = false;
	if (leaderboardContainer) leaderboardContainer.visible = false;
	if (gameContainer) gameContainer.visible = false;
	if (victoryScreenContainer) victoryScreenContainer.visible = false;
	if (!boardSizeContainer) {
		boardSizeContainer = game.addChild(new Container());
		var title = new Text2('Select Board Size', {
			size: 120,
			fill: 0xFFFFFF
		});
		title.anchor.set(0.5, 0.5);
		title.x = 2048 / 2;
		title.y = 2732 / 2 - 400;
		boardSizeContainer.addChild(title);
		var size4x4Button = new Text2('4x4', {
			size: 100,
			fill: 0xFFFFFF
		});
		size4x4Button.anchor.set(0.5, 0.5);
		size4x4Button.x = 2048 / 2;
		size4x4Button.y = 2732 / 2 - 100;
		size4x4Button.down = function () {
			setBoardSize(4, 4);
			startGame();
		};
		boardSizeContainer.addChild(size4x4Button);
		var size4x5Button = new Text2('4x5', {
			size: 100,
			fill: 0xFFFFFF
		});
		size4x5Button.anchor.set(0.5, 0.5);
		size4x5Button.x = 2048 / 2;
		size4x5Button.y = 2732 / 2 + 50;
		size4x5Button.down = function () {
			setBoardSize(4, 5);
			startGame();
		};
		boardSizeContainer.addChild(size4x5Button);
		var size4x6Button = new Text2('4x6', {
			size: 100,
			fill: 0xFFFFFF
		});
		size4x6Button.anchor.set(0.5, 0.5);
		size4x6Button.x = 2048 / 2;
		size4x6Button.y = 2732 / 2 + 200;
		size4x6Button.down = function () {
			setBoardSize(4, 6);
			startGame();
		};
		boardSizeContainer.addChild(size4x6Button);
		var backButton = new Text2('Back', {
			size: 80,
			fill: 0xFFFFFF
		});
		backButton.anchor.set(0.5, 0.5);
		backButton.x = 2048 / 2;
		backButton.y = 2732 / 2 + 400;
		backButton.down = function () {
			showStartScreen();
		};
		boardSizeContainer.addChild(backButton);
	}
	boardSizeContainer.visible = true;
	scoreTxt.visible = false;
}
function setBoardSize(cols, rows) {
	COLS = cols;
	ROWS = rows;
	TOTAL_PAIRS = COLS * ROWS / 2;
	gridWidth = COLS * (CARD_WIDTH + MARGIN) - MARGIN;
	gridHeight = ROWS * (CARD_HEIGHT + MARGIN) - MARGIN;
	startX = (2048 - gridWidth) / 2 + CARD_WIDTH / 2;
	startY = (2732 - gridHeight) / 2 + CARD_HEIGHT / 2;
}
function showLeaderboard() {
	if (startScreenContainer) startScreenContainer.visible = false;
	if (boardSizeContainer) boardSizeContainer.visible = false;
	if (!leaderboardContainer) {
		leaderboardContainer = game.addChild(new Container());
		var title = new Text2('Leaderboard', {
			size: 150,
			fill: 0xFFFFFF
		});
		title.anchor.set(0.5, 0.5);
		title.x = 2048 / 2;
		title.y = 2732 / 2 - 600;
		leaderboardContainer.addChild(title);
		var header = new Text2('RANK  USER    SCORE  STREAK', {
			size: 70,
			fill: 0xCCCCCC
		});
		header.anchor.set(0.5, 0.5);
		header.x = 2048 / 2;
		header.y = 2732 / 2 - 300;
		leaderboardContainer.addChild(header);
		var highScore = storage.highScore || 0;
		var highScoreStreak = storage.highScoreStreak || 0;
		var userLine = new Text2('1      You      ' + highScore + '      ' + highScoreStreak, {
			size: 90,
			fill: 0xFFFFFF
		});
		userLine.anchor.set(0.5, 0.5);
		userLine.x = 2048 / 2;
		userLine.y = 2732 / 2 - 150;
		leaderboardContainer.addChild(userLine);
		leaderboardContainer.userLine = userLine; // Store reference
		var backButton = new Text2('Back', {
			size: 100,
			fill: 0xFFFFFF
		});
		backButton.anchor.set(0.5, 0.5);
		backButton.x = 2048 / 2;
		backButton.y = 2732 / 2 + 300;
		backButton.down = function () {
			showStartScreen();
		};
		leaderboardContainer.addChild(backButton);
	} else {
		var highScore = storage.highScore || 0;
		var highScoreStreak = storage.highScoreStreak || 0;
		leaderboardContainer.userLine.setText('1      You      ' + highScore + '      ' + highScoreStreak);
	}
	leaderboardContainer.visible = true;
	scoreTxt.visible = false;
}
function showVictoryScreen() {
	if (gameContainer) gameContainer.visible = false;
	if (boardSizeContainer) boardSizeContainer.visible = false;
	scoreTxt.visible = false;
	if (!victoryScreenContainer) {
		victoryScreenContainer = game.addChild(new Container());
		var title = new Text2('You Win!', {
			size: 150,
			fill: 0xFFD700
		});
		title.anchor.set(0.5, 0.5);
		title.x = 2048 / 2;
		title.y = 2732 / 2 - 400;
		victoryScreenContainer.addChild(title);
		var finalScoreText = new Text2('Final Score: ' + LK.getScore(), {
			size: 100,
			fill: 0xFFFFFF
		});
		finalScoreText.anchor.set(0.5, 0.5);
		finalScoreText.x = 2048 / 2;
		finalScoreText.y = 2732 / 2 - 200;
		victoryScreenContainer.addChild(finalScoreText);
		victoryScreenContainer.finalScoreText = finalScoreText; // To update it later
		var playAgainButton = new Text2('Play Again', {
			size: 100,
			fill: 0xFFFFFF
		});
		playAgainButton.anchor.set(0.5, 0.5);
		playAgainButton.x = 2048 / 2;
		playAgainButton.y = 2732 / 2;
		playAgainButton.down = function () {
			startGame();
		};
		victoryScreenContainer.addChild(playAgainButton);
		var mainMenuButton = new Text2('Main Menu', {
			size: 100,
			fill: 0xFFFFFF
		});
		mainMenuButton.anchor.set(0.5, 0.5);
		mainMenuButton.x = 2048 / 2;
		mainMenuButton.y = 2732 / 2 + 200;
		mainMenuButton.down = function () {
			showStartScreen();
		};
		victoryScreenContainer.addChild(mainMenuButton);
	} else {
		victoryScreenContainer.finalScoreText.setText('Final Score: ' + LK.getScore());
	}
	victoryScreenContainer.visible = true;
}
function startGame() {
	if (startScreenContainer) startScreenContainer.visible = false;
	if (boardSizeContainer) boardSizeContainer.visible = false;
	if (leaderboardContainer) leaderboardContainer.visible = false;
	if (victoryScreenContainer) victoryScreenContainer.visible = false;
	if (!gameContainer) {
		gameContainer = game.addChild(new Container());
	}
	gameContainer.visible = true;
	// Clear old cards
	for (var i = 0; i < cards.length; i++) {
		cards[i].destroy();
	}
	// Reset game state
	cards = [];
	flippedCards = [];
	matchedPairs = 0;
	canPlay = true;
	streakCount = 0;
	maxStreak = 0;
	LK.setScore(0);
	scoreTxt.setText('Score: ' + LK.getScore());
	scoreTxt.visible = true;
	setupBoard();
}
// --- Game Logic Functions ---
function showStreakAnimation(bonusPoints) {
	var bonusContainer = new Container();
	bonusContainer.x = 2048 / 2;
	bonusContainer.y = 2732 / 2;
	var bonusText = new Text2('BONUS!!!', {
		size: 120,
		fill: 0xFFD700
	});
	bonusText.anchor.set(0.5, 0.5);
	bonusText.y = -70;
	bonusContainer.addChild(bonusText);
	var pointsText = new Text2('+' + bonusPoints, {
		size: 100,
		fill: 0xFFFFFF
	});
	pointsText.anchor.set(0.5, 0.5);
	pointsText.y = 70;
	bonusContainer.addChild(pointsText);
	gameContainer.addChild(bonusContainer);
	tween(bonusContainer, {
		y: bonusContainer.y - 200,
		alpha: 0
	}, {
		duration: 1000,
		easing: tween.easeOut,
		onFinish: function onFinish() {
			// Self-destruct after animation. Check parent to avoid errors
			// if the game state was cleared during the animation.
			if (bonusContainer.parent) {
				bonusContainer.destroy();
			}
		}
	});
}
function handleCardFlip(card) {
	if (!canPlay || card.isFlipped || card.isMatched || flippedCards.length >= 2) {
		return;
	}
	flippedCards.push(card);
	card.flipUp(function () {
		if (flippedCards.length === 2) {
			canPlay = false;
			checkMatch();
		}
	});
}
function checkMatch() {
	var card1 = flippedCards[0];
	var card2 = flippedCards[1];
	if (card1.pairId === card2.pairId) {
		matchedPairs++;
		streakCount++;
		if (streakCount > maxStreak) {
			maxStreak = streakCount;
		}
		// Calculate points based on streak
		var points = 10;
		var bonusPoints = 0;
		if (streakCount === 2) {
			points = 20;
			bonusPoints = 10;
		} else if (streakCount >= 3) {
			points = 30;
			bonusPoints = 20;
		}
		if (bonusPoints > 0) {
			showStreakAnimation(bonusPoints);
		}
		LK.setScore(LK.getScore() + points);
		scoreTxt.setText('Score: ' + LK.getScore());
		LK.setTimeout(function () {
			LK.getSound('match').play();
			card1.matchFound();
			card2.matchFound(function () {
				resetTurn();
				if (matchedPairs === TOTAL_PAIRS) {
					var highScore = storage.highScore || 0;
					var highScoreStreak = storage.highScoreStreak || 0;
					if (LK.getScore() > highScore) {
						storage.highScore = LK.getScore();
						storage.highScoreStreak = maxStreak;
					}
					LK.getSound('win').play();
					showVictoryScreen();
				}
			});
		}, 750);
	} else {
		// Reset streak on miss
		streakCount = 0;
		LK.setTimeout(function () {
			card1.flipDown();
			card2.flipDown(function () {
				resetTurn();
			});
		}, 1000);
	}
}
function resetTurn() {
	flippedCards = [];
	canPlay = true;
}
function shuffle(array) {
	var currentIndex = array.length,
		randomIndex;
	while (currentIndex !== 0) {
		randomIndex = Math.floor(Math.random() * currentIndex);
		currentIndex--;
		var _ref = [array[randomIndex], array[currentIndex]];
		array[currentIndex] = _ref[0];
		array[randomIndex] = _ref[1];
	}
	return array;
}
function isLayoutValid(grid) {
	for (var row = 0; row < ROWS; row++) {
		for (var col = 0; col < COLS; col++) {
			var currentPairId = grid[row][col];
			// Check all 8 neighbors
			for (var dr = -1; dr <= 1; dr++) {
				for (var dc = -1; dc <= 1; dc++) {
					if (dr === 0 && dc === 0) continue; // Don't check self
					var neighborRow = row + dr;
					var neighborCol = col + dc;
					if (neighborRow >= 0 && neighborRow < ROWS && neighborCol >= 0 && neighborCol < COLS) {
						if (grid[neighborRow][neighborCol] === currentPairId) {
							return false; // Found an adjacent match
						}
					}
				}
			}
		}
	}
	return true; // No adjacent matches found
}
// --- Board Setup ---
function setupBoard() {
	var pairIds = [];
	// Create a list of all available card face IDs (0 to TOTAL_CARD_FACES-1)
	var allFaceIndices = [];
	for (var i = 0; i < TOTAL_CARD_FACES; i++) {
		allFaceIndices.push(i);
	}
	// Shuffle the available faces and select enough for the board
	shuffle(allFaceIndices);
	var gameFaceIndices = allFaceIndices.slice(0, TOTAL_PAIRS);
	// Create pairs from the selected faces
	for (var i = 0; i < TOTAL_PAIRS; i++) {
		pairIds.push(gameFaceIndices[i], gameFaceIndices[i]);
	}
	var grid = [];
	var attempts = 0;
	var maxAttempts = 100; // Safeguard to prevent infinite loop
	do {
		shuffle(pairIds);
		// Create a 2D grid from the shuffled IDs
		for (var r = 0; r < ROWS; r++) {
			grid[r] = [];
			for (var c = 0; c < COLS; c++) {
				grid[r][c] = pairIds[r * COLS + c];
			}
		}
		attempts++;
	} while (!isLayoutValid(grid) && attempts < maxAttempts);
	// Create cards from the final grid layout
	for (var row = 0; row < ROWS; row++) {
		for (var col = 0; col < COLS; col++) {
			var pairId = grid[row][col];
			var card = new Card(pairId);
			card.x = startX + col * (CARD_WIDTH + MARGIN);
			card.y = startY + row * (CARD_HEIGHT + MARGIN);
			cards.push(card);
			gameContainer.addChild(card);
		}
	}
}
// --- Initial Call ---
showStartScreen();

===================================================================
--- original.js
+++ change.js
@@ -113,9 +113,9 @@
 // --- Game Constants ---
 var COLS = 4;
 var ROWS = 4;
 var TOTAL_PAIRS = COLS * ROWS / 2;
-var TOTAL_CARD_FACES = 13;
+var TOTAL_CARD_FACES = 15;
 var CARD_WIDTH = 350;
 var CARD_HEIGHT = 350;
 var MARGIN = 60;
 var gridWidth = COLS * (CARD_WIDTH + MARGIN) - MARGIN;