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

/**** 
* Classes
****/ 
var Card = Container.expand(function (symbolType) {
	var self = Container.call(this);
	self.symbolType = symbolType;
	self.isFlipped = false;
	self.isMatched = false;
	self.canFlip = true;
	// Card back (always visible when not flipped)
	var cardBack = self.attachAsset('cardBack', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Card front (white background)
	var cardFront = self.attachAsset('cardFront', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0
	});
	// Symbol on the card
	var symbol = self.attachAsset('symbol' + symbolType, {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0
	});
	self.flip = function () {
		if (!self.canFlip || self.isMatched) return;
		LK.getSound('cardFlip').play();
		self.isFlipped = !self.isFlipped;
		if (self.isFlipped) {
			// Show front and symbol
			tween(cardFront, {
				alpha: 1
			}, {
				duration: 200
			});
			tween(symbol, {
				alpha: 1
			}, {
				duration: 200
			});
		} else {
			// Hide front and symbol
			tween(cardFront, {
				alpha: 0
			}, {
				duration: 200
			});
			tween(symbol, {
				alpha: 0
			}, {
				duration: 200
			});
		}
	};
	self.setMatched = function () {
		self.isMatched = true;
		self.canFlip = false;
		// Add a subtle scale effect for matched cards
		tween(self, {
			scaleX: 1.1,
			scaleY: 1.1
		}, {
			duration: 300,
			easing: tween.easeOut
		});
	};
	self.down = function (x, y, obj) {
		if (self.canFlip && !self.isFlipped && !self.isMatched) {
			handleCardTap(self);
		}
	};
	return self;
});

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

/**** 
* Game Code
****/ 
// Game variables
var cards = [];
var flippedCards = [];
var moves = 0;
var startTime = Date.now();
var gameCompleted = false;
var canFlipCards = true;
var currentLevel = storage.currentLevel || 1;
var gameStartTime = Date.now();
var LEVEL_TIME_LIMIT = 120; // 2 minutes in seconds
var MOVE_LIMIT = 15;
var gameOver = false;
var showMenu = true;
// Grid configuration
var GRID_COLS = 4;
var GRID_ROWS = 4;
var CARD_SIZE = 200;
var CARD_SPACING = 20;
// UI elements
var movesTxt = new Text2('Moves: 0', {
	size: 60,
	fill: 0xFFFFFF
});
movesTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(movesTxt);
movesTxt.y = 100;
var timerTxt = new Text2('Time: 0:00', {
	size: 60,
	fill: 0xFFFFFF
});
timerTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(timerTxt);
timerTxt.y = 180;
// Initialize coins from storage
var coins = storage.coins || 0;
var coinsTxt = new Text2('Coins: ' + coins, {
	size: 60,
	fill: 0xFFD700
});
coinsTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(coinsTxt);
coinsTxt.y = 260;
// Initialize saved games from storage
var savedGames = storage.savedGames || [];
// Ensure savedGames is always an array with 5 slots
if (!Array.isArray(savedGames)) {
	savedGames = [];
}
// Ensure we have exactly 5 slots
while (savedGames.length < 5) {
	savedGames.push(null);
}
var levelTxt = new Text2('Level: ' + currentLevel, {
	size: 60,
	fill: 0xFFFFFF
});
levelTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(levelTxt);
levelTxt.y = 340;
// Power-up UI elements
var bombTxt = new Text2('Bomb (10 coins)', {
	size: 40,
	fill: 0xFF6B6B
});
bombTxt.anchor.set(0, 0);
LK.gui.topLeft.addChild(bombTxt);
bombTxt.x = 120;
bombTxt.y = 100;
var lightbulbTxt = new Text2('Hint (15 coins)', {
	size: 40,
	fill: 0xFFD700
});
lightbulbTxt.anchor.set(0, 0);
LK.gui.topLeft.addChild(lightbulbTxt);
lightbulbTxt.x = 120;
lightbulbTxt.y = 160;
var clockTxt = new Text2('Clock (20 coins)', {
	size: 40,
	fill: 0x4ECDC4
});
clockTxt.anchor.set(0, 0);
LK.gui.topLeft.addChild(clockTxt);
clockTxt.x = 120;
clockTxt.y = 220;
var timerPowerTxt = new Text2('Timer (5 coins)', {
	size: 40,
	fill: 0x96CEB4
});
timerPowerTxt.anchor.set(0, 0);
LK.gui.topLeft.addChild(timerPowerTxt);
timerPowerTxt.x = 120;
timerPowerTxt.y = 280;
var skipTxt = new Text2('Skip (100 coins)', {
	size: 40,
	fill: 0xFF9FF3
});
skipTxt.anchor.set(0, 0);
LK.gui.topLeft.addChild(skipTxt);
skipTxt.x = 120;
skipTxt.y = 340;
// Menu screen elements
var menuContainer = new Container();
game.addChild(menuContainer);
var titleTxt = new Text2('MEMORY MATCH', {
	size: 120,
	fill: 0xFFFFFF
});
titleTxt.anchor.set(0.5, 0.5);
titleTxt.x = 2048 / 2;
titleTxt.y = 600;
menuContainer.addChild(titleTxt);
var levelInfoTxt = new Text2('Current Level: ' + currentLevel, {
	size: 80,
	fill: 0xFFD700
});
levelInfoTxt.anchor.set(0.5, 0.5);
levelInfoTxt.x = 2048 / 2;
levelInfoTxt.y = 800;
menuContainer.addChild(levelInfoTxt);
var coinsInfoTxt = new Text2('Coins: ' + coins, {
	size: 80,
	fill: 0xFFD700
});
coinsInfoTxt.anchor.set(0.5, 0.5);
coinsInfoTxt.x = 2048 / 2;
coinsInfoTxt.y = 900;
menuContainer.addChild(coinsInfoTxt);
var playBtn = new Text2('PLAY', {
	size: 100,
	fill: 0x4ECDC4
});
playBtn.anchor.set(0.5, 0.5);
playBtn.x = 2048 / 2;
playBtn.y = 1200;
menuContainer.addChild(playBtn);
var instructionsTxt = new Text2('Match pairs of cards to advance levels!\nEarn coins to buy power-ups!', {
	size: 60,
	fill: 0xCCCCCC
});
instructionsTxt.anchor.set(0.5, 0.5);
instructionsTxt.x = 2048 / 2;
instructionsTxt.y = 1400;
menuContainer.addChild(instructionsTxt);
var progressTxt = new Text2('Progress: ' + currentLevel + '/500', {
	size: 70,
	fill: 0x96CEB4
});
progressTxt.anchor.set(0.5, 0.5);
progressTxt.x = 2048 / 2;
progressTxt.y = 1600;
menuContainer.addChild(progressTxt);
// Save game slots UI
var saveGamesTxt = new Text2('SAVED GAMES', {
	size: 80,
	fill: 0xFFFFFF
});
saveGamesTxt.anchor.set(0.5, 0.5);
saveGamesTxt.x = 2048 / 2;
saveGamesTxt.y = 1800;
menuContainer.addChild(saveGamesTxt);
// Create 5 save game slot buttons
var saveSlots = [];
for (var i = 0; i < 5; i++) {
	var slotData = savedGames[i];
	var slotText = 'Slot ' + (i + 1);
	if (slotData) {
		slotText += ' - Level ' + slotData.level + ' (' + slotData.coins + ' coins)';
	} else {
		slotText += ' - Empty';
	}
	var slotBtn = new Text2(slotText, {
		size: 50,
		fill: slotData ? 0x4ECDC4 : 0x666666
	});
	slotBtn.anchor.set(0.5, 0.5);
	slotBtn.x = 2048 / 2;
	slotBtn.y = 1900 + i * 80;
	slotBtn.slotIndex = i;
	menuContainer.addChild(slotBtn);
	saveSlots.push(slotBtn);
}
// Create card types array based on level (4 tiles for first level + 6 tiles per additional level)
var totalTiles;
if (currentLevel === 1) {
	totalTiles = 4; // First level has exactly 4 tiles
} else {
	totalTiles = 4 + (currentLevel - 1) * 6; // 4 base tiles + 6 per level
}
var pairCount = totalTiles / 2;
var cardTypes = [];
for (var i = 1; i <= pairCount; i++) {
	var symbolIndex = (i - 1) % 8 + 1; // Cycle through available symbols
	cardTypes.push(symbolIndex);
	cardTypes.push(symbolIndex); // Add pair
}
// Shuffle function
function shuffleArray(array) {
	for (var i = array.length - 1; i > 0; i--) {
		var j = Math.floor(Math.random() * (i + 1));
		var temp = array[i];
		array[i] = array[j];
		array[j] = temp;
	}
	return array;
}
// Initialize cards
function initializeCards() {
	var shuffledTypes = shuffleArray(cardTypes);
	// Calculate dynamic grid size based on total tiles
	var totalTiles = cardTypes.length;
	GRID_COLS = Math.ceil(Math.sqrt(totalTiles));
	GRID_ROWS = Math.ceil(totalTiles / GRID_COLS);
	// Adjust card size based on grid size
	if (totalTiles > 16) {
		CARD_SIZE = Math.max(120, 200 - (totalTiles - 16) * 5);
		CARD_SPACING = Math.max(10, 20 - (totalTiles - 16) * 1);
	}
	// Calculate grid positioning
	var gridWidth = GRID_COLS * CARD_SIZE + (GRID_COLS - 1) * CARD_SPACING;
	var gridHeight = GRID_ROWS * CARD_SIZE + (GRID_ROWS - 1) * CARD_SPACING;
	var startX = (2048 - gridWidth) / 2 + CARD_SIZE / 2;
	var startY = (2732 - gridHeight) / 2 + CARD_SIZE / 2;
	for (var i = 0; i < totalTiles; i++) {
		var row = Math.floor(i / GRID_COLS);
		var col = i % GRID_COLS;
		var card = new Card(shuffledTypes[i]);
		card.x = startX + col * (CARD_SIZE + CARD_SPACING);
		card.y = startY + row * (CARD_SIZE + CARD_SPACING);
		cards.push(card);
		game.addChild(card);
	}
}
// Handle card tap
function handleCardTap(card) {
	if (!canFlipCards || flippedCards.length >= 2 || gameOver) return;
	card.flip();
	flippedCards.push(card);
	if (flippedCards.length === 2) {
		moves++;
		movesTxt.setText('Moves: ' + moves);
		// Check if move limit exceeded
		if (moves >= MOVE_LIMIT) {
			gameOver = true;
			// Save current level progress before game over
			storage.currentLevel = currentLevel;
			// Auto-save to first available slot
			var autoSaveSlot = -1;
			for (var j = 0; j < 5; j++) {
				if (!savedGames[j]) {
					autoSaveSlot = j;
					break;
				}
			}
			if (autoSaveSlot === -1) autoSaveSlot = 0; // Use first slot if all occupied
			saveGame(autoSaveSlot);
			LK.setTimeout(function () {
				LK.showGameOver();
			}, 1000);
			return;
		}
		canFlipCards = false;
		// Check for match after a short delay
		LK.setTimeout(function () {
			checkForMatch();
		}, 1000);
	}
}
// Check if two flipped cards match
function checkForMatch() {
	var card1 = flippedCards[0];
	var card2 = flippedCards[1];
	if (card1.symbolType === card2.symbolType) {
		// Match found
		LK.getSound('match').play();
		card1.setMatched();
		card2.setMatched();
		// Award 5 coins for matching pair
		coins += 5;
		storage.coins = coins;
		coinsTxt.setText('Coins: ' + coins);
		// Check if game is complete
		var matchedCount = 0;
		for (var i = 0; i < cards.length; i++) {
			if (cards[i].isMatched) {
				matchedCount++;
			}
		}
		if (matchedCount === cards.length) {
			gameCompleted = true;
			// Save current level completion
			storage.currentLevel = currentLevel;
			// Auto-save to first available slot
			var autoSaveSlot = -1;
			for (var j = 0; j < 5; j++) {
				if (!savedGames[j]) {
					autoSaveSlot = j;
					break;
				}
			}
			if (autoSaveSlot === -1) autoSaveSlot = 0; // Use first slot if all occupied
			saveGame(autoSaveSlot);
			// Check if we've completed all 500 levels
			if (currentLevel >= 500) {
				// Show you win when all levels are completed
				LK.setTimeout(function () {
					LK.showYouWin();
				}, 1000);
			} else {
				// Advance to next level
				currentLevel++;
				storage.currentLevel = currentLevel; // Save current level to storage
				levelTxt.setText('Level: ' + currentLevel);
				// Reset for next level
				LK.setTimeout(function () {
					resetLevel();
				}, 1000);
			}
		}
	} else {
		// No match
		LK.getSound('noMatch').play();
		card1.flip();
		card2.flip();
	}
	flippedCards = [];
	canFlipCards = true;
}
// Reset level for progression
function resetLevel() {
	// Clear existing cards
	for (var i = 0; i < cards.length; i++) {
		cards[i].destroy();
	}
	cards = [];
	flippedCards = [];
	moves = 0;
	gameCompleted = false;
	canFlipCards = true;
	gameOver = false;
	gameStartTime = Date.now();
	startTime = Date.now();
	// Update UI
	movesTxt.setText('Moves: 0');
	timerTxt.setText('Time: 0:00');
	// Recreate card types for new level
	var totalTiles;
	if (currentLevel === 1) {
		totalTiles = 4; // First level has exactly 4 tiles
	} else {
		totalTiles = 4 + (currentLevel - 1) * 6; // 4 base tiles + 6 per level
	}
	var pairCount = totalTiles / 2;
	cardTypes = [];
	for (var i = 1; i <= pairCount; i++) {
		var symbolIndex = (i - 1) % 8 + 1;
		cardTypes.push(symbolIndex);
		cardTypes.push(symbolIndex);
	}
	// Initialize new cards
	initializeCards();
}
// Format time display
function formatTime(seconds) {
	var minutes = Math.floor(seconds / 60);
	var remainingSeconds = seconds % 60;
	return minutes + ':' + (remainingSeconds < 10 ? '0' : '') + remainingSeconds;
}
// Power-up functions
function useBomb() {
	if (coins >= 10) {
		coins -= 10;
		storage.coins = coins;
		coinsTxt.setText('Coins: ' + coins);
		// Delete 6 random non-matched cards
		var availableCards = [];
		for (var i = 0; i < cards.length; i++) {
			if (!cards[i].isMatched) {
				availableCards.push(cards[i]);
			}
		}
		var cardsToRemove = Math.min(6, availableCards.length);
		for (var i = 0; i < cardsToRemove; i++) {
			var randomIndex = Math.floor(Math.random() * availableCards.length);
			var cardToRemove = availableCards[randomIndex];
			cardToRemove.destroy();
			cards.splice(cards.indexOf(cardToRemove), 1);
			availableCards.splice(randomIndex, 1);
		}
	}
}
function useLightbulb() {
	if (coins >= 15) {
		coins -= 15;
		storage.coins = coins;
		coinsTxt.setText('Coins: ' + coins);
		// Find a matching pair that's not matched yet
		var unmatchedCards = [];
		for (var i = 0; i < cards.length; i++) {
			if (!cards[i].isMatched) {
				unmatchedCards.push(cards[i]);
			}
		}
		// Group by symbol type
		var symbolGroups = {};
		for (var i = 0; i < unmatchedCards.length; i++) {
			var card = unmatchedCards[i];
			if (!symbolGroups[card.symbolType]) {
				symbolGroups[card.symbolType] = [];
			}
			symbolGroups[card.symbolType].push(card);
		}
		// Find first pair and show them
		for (var symbolType in symbolGroups) {
			if (symbolGroups[symbolType].length >= 2) {
				var pair = symbolGroups[symbolType].slice(0, 2);
				for (var i = 0; i < pair.length; i++) {
					if (!pair[i].isFlipped) {
						pair[i].flip();
					}
				}
				break;
			}
		}
	}
}
function useClock() {
	if (coins >= 20) {
		coins -= 20;
		storage.coins = coins;
		coinsTxt.setText('Coins: ' + coins);
		// Add 5 minutes (300 seconds) to game time
		gameStartTime -= 300000; // Subtract 5 minutes from start time to effectively add time
	}
}
function useTimer() {
	if (coins >= 5) {
		coins -= 5;
		storage.coins = coins;
		coinsTxt.setText('Coins: ' + coins);
		// Add 1 minute (60 seconds) to game time
		gameStartTime -= 60000; // Subtract 1 minute from start time to effectively add time
	}
}
function useSkip() {
	if (coins >= 100) {
		coins -= 100;
		storage.coins = coins;
		coinsTxt.setText('Coins: ' + coins);
		// Save current level before skipping
		storage.currentLevel = currentLevel;
		// Check if we've completed all 500 levels
		if (currentLevel >= 500) {
			// Show you win when all levels are completed
			LK.setTimeout(function () {
				LK.showYouWin();
			}, 1000);
		} else {
			// Advance to next level
			currentLevel++;
			storage.currentLevel = currentLevel; // Save current level to storage
			levelTxt.setText('Level: ' + currentLevel);
			// Reset for next level
			LK.setTimeout(function () {
				resetLevel();
			}, 1000);
		}
	}
}
// Function to save current game state
function saveGame(slotIndex) {
	var gameData = {
		level: currentLevel,
		coins: coins,
		timestamp: Date.now()
	};
	// Ensure savedGames is initialized as an array
	if (!Array.isArray(savedGames)) {
		savedGames = [];
	}
	// Ensure we have enough slots
	while (savedGames.length <= slotIndex) {
		savedGames.push(null);
	}
	savedGames[slotIndex] = gameData;
	storage.savedGames = savedGames;
	// Update the slot button text only if saveSlots exists and has the slot
	if (saveSlots && saveSlots[slotIndex]) {
		var slotBtn = saveSlots[slotIndex];
		slotBtn.setText('Slot ' + (slotIndex + 1) + ' - Level ' + gameData.level + ' (' + gameData.coins + ' coins)');
		slotBtn.tint = 0x4ECDC4;
	}
}
// Function to load saved game
function loadGame(slotIndex) {
	var gameData = savedGames[slotIndex];
	if (gameData) {
		currentLevel = gameData.level;
		coins = gameData.coins;
		storage.currentLevel = currentLevel;
		storage.coins = coins;
		// Update UI
		levelInfoTxt.setText('Current Level: ' + currentLevel);
		coinsInfoTxt.setText('Coins: ' + coins);
		progressTxt.setText('Progress: ' + currentLevel + '/500');
	}
}
// Function to start the game
function startGame() {
	showMenu = false;
	menuContainer.visible = false;
	// Show game UI elements
	movesTxt.visible = true;
	timerTxt.visible = true;
	coinsTxt.visible = true;
	levelTxt.visible = true;
	bombTxt.visible = true;
	lightbulbTxt.visible = true;
	clockTxt.visible = true;
	timerPowerTxt.visible = true;
	skipTxt.visible = true;
	// Initialize game
	initializeCards();
	gameStartTime = Date.now();
	startTime = Date.now();
}
// Add click handlers for power-ups
bombTxt.down = function (x, y, obj) {
	useBomb();
};
lightbulbTxt.down = function (x, y, obj) {
	useLightbulb();
};
clockTxt.down = function (x, y, obj) {
	useClock();
};
timerPowerTxt.down = function (x, y, obj) {
	useTimer();
};
skipTxt.down = function (x, y, obj) {
	useSkip();
};
// Save game slot click handlers
for (var i = 0; i < saveSlots.length; i++) {
	saveSlots[i].down = function (x, y, obj) {
		var slotIndex = obj.slotIndex;
		var gameData = savedGames[slotIndex];
		if (gameData) {
			// Load existing save
			loadGame(slotIndex);
		} else {
			// Save current game to empty slot
			saveGame(slotIndex);
		}
	};
}
// Play button click handler
playBtn.down = function (x, y, obj) {
	// Reset to level 1 when starting new game
	currentLevel = 1;
	storage.currentLevel = currentLevel;
	levelTxt.setText('Level: ' + currentLevel);
	levelInfoTxt.setText('Current Level: ' + currentLevel);
	progressTxt.setText('Progress: ' + currentLevel + '/500');
	startGame();
};
// Hide game UI elements initially (show only in game)
movesTxt.visible = false;
timerTxt.visible = false;
coinsTxt.visible = false;
levelTxt.visible = false;
bombTxt.visible = false;
lightbulbTxt.visible = false;
clockTxt.visible = false;
timerPowerTxt.visible = false;
skipTxt.visible = false;
// Don't initialize cards immediately - wait for menu
// initializeCards(); // This will be called when starting the game
// Main game update loop
game.update = function () {
	// Only update game logic if not in menu
	if (!showMenu) {
		// Update timer
		if (!gameCompleted && !gameOver) {
			var elapsedTime = Math.floor((Date.now() - gameStartTime) / 1000);
			var remainingTime = Math.max(0, LEVEL_TIME_LIMIT - elapsedTime);
			timerTxt.setText('Time: ' + formatTime(remainingTime));
			// Check if time is up
			if (remainingTime <= 0) {
				gameOver = true;
				// Save current level progress before game over
				storage.currentLevel = currentLevel;
				// Auto-save to first available slot
				var autoSaveSlot = -1;
				for (var j = 0; j < 5; j++) {
					if (!savedGames[j]) {
						autoSaveSlot = j;
						break;
					}
				}
				if (autoSaveSlot === -1) autoSaveSlot = 0; // Use first slot if all occupied
				saveGame(autoSaveSlot);
				LK.showGameOver();
			}
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -133,8 +133,16 @@
 LK.gui.top.addChild(coinsTxt);
 coinsTxt.y = 260;
 // Initialize saved games from storage
 var savedGames = storage.savedGames || [];
+// Ensure savedGames is always an array with 5 slots
+if (!Array.isArray(savedGames)) {
+	savedGames = [];
+}
+// Ensure we have exactly 5 slots
+while (savedGames.length < 5) {
+	savedGames.push(null);
+}
 var levelTxt = new Text2('Level: ' + currentLevel, {
 	size: 60,
 	fill: 0xFFFFFF
 });
@@ -556,8 +564,16 @@
 		level: currentLevel,
 		coins: coins,
 		timestamp: Date.now()
 	};
+	// Ensure savedGames is initialized as an array
+	if (!Array.isArray(savedGames)) {
+		savedGames = [];
+	}
+	// Ensure we have enough slots
+	while (savedGames.length <= slotIndex) {
+		savedGames.push(null);
+	}
 	savedGames[slotIndex] = gameData;
 	storage.savedGames = savedGames;
 	// Update the slot button text only if saveSlots exists and has the slot
 	if (saveSlots && saveSlots[slotIndex]) {