/**** 
* Classes
****/
// HexTile class for the hexagon tiles
var HexTile = Container.expand(function (id, colorIndex) {
	var self = Container.call(this);
	self.id = id;
	var hexGraphics = self.attachAsset('hexTile', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 2,
		scaleY: 2
	});
	var numberText = new Text2('', {
		size: 100,
		fill: '#333333' // Slightly lighter black
	});
	numberText.anchor.set(0.5, 0.5);
	numberText.visible = playerTouchedScreen;
	self.addChild(numberText);
	self.setNumber = function (number) {
		self.number = number;
		numberText.setText(number.toString());
	};
	self.isSelected = false;
	self.toggleSelect = function () {
		if (!self.isSelected || selectedTiles.length < 2) {
			self.isSelected = !self.isSelected;
			hexGraphics.alpha = self.isSelected ? 0.5 : 1;
			if (self.isSelected) {
				numberText.setText(self.number.toString());
			} else {
				numberText.setText('');
			}
		}
	};
});

/**** 
* Initialize Game
****/
var game = new LK.Game({
	backgroundColor: [0xADD8E6, 0xFAD7A5, 0xFFB6C1, 0xFFA07A, 0xB39BDB, 0x90EE90][Math.floor(Math.random() * 6)] // Randomly choose from soft light blue, soft light orange, soft pink, soft light red, soft light yellow, soft light green
});

/**** 
* Game Code
****/
var gameTitle = new Text2('Memo-Hex', {
	size: 200,
	fill: '#ffffff',
	alpha: 1
});
gameTitle.anchor.set(0.5, 0);
gameTitle.x = 0; // Center horizontally
gameTitle.y = 100; // Move down 100 pixels
LK.gui.top.addChild(gameTitle);
// Blinking 'Touch to start' text
var touchToStartText = new Text2('Touch to start', {
	size: 100,
	fill: '#ffffff',
	alpha: 1
});
touchToStartText.anchor.set(0.5, 0);
touchToStartText.x = 0; // Center horizontally
touchToStartText.y = gameTitle.y + gameTitle.height + 80; // Position below the game title
LK.gui.top.addChild(touchToStartText);
// Blinking effect
var blink = true;
LK.setInterval(function () {
	blink = !blink;
	touchToStartText.alpha = blink ? 1 : 0;
}, 500);
var howToPlayText = new Text2('How to Play: \n• Memorize the hex numbers on countdown \n• Wait for goal number to appear above hex tiles \n• Touch two hexes that add up to the number \n• Repeat until all combinations possible are found', {
	size: 60,
	fill: '#ffffff',
	alpha: 1
});
howToPlayText.anchor.set(0.5, 0.5);
howToPlayText.x = 0;
howToPlayText.y = 1500;
LK.gui.top.addChild(howToPlayText);
// Modify game's 'down' event listener to hide howToPlayText after first touch
var originalGameDownHandler = game._events && game._events['down'] ? game._events['down'][0] : function () {};
function newGameDownHandler(obj) {
	howToPlayText.alpha = 0;
	originalGameDownHandler(obj);
	// Make level text visible on first touch
	levelText.alpha = 1;
	levelText.visible = true;
	countdownText.visible = true;
	touchToStartText.visible = false;
	gameTitle.visible = false;
	// Make hexTile numbers visible on first touch
	for (var i = 0; i < hexTiles.length; i++) {
		hexTiles[i].getChildAt(1).visible = true;
	}
}
game.off('down', originalGameDownHandler);
game.on('down', newGameDownHandler);
game.on('down', function (obj) {
	playerTouchedScreen = true;
	// Make life icons visible on first touch
	for (var i = 0; i < lifeIcons.length; i++) {
		lifeIcons[i].alpha = 1;
	}
});
var playerTouchedScreen = false;
function resetGameForNextLevel() {
	// Reset hexTiles numbers
	for (var i = 0; i < hexTiles.length; i++) {
		// Number generation and assignment removed from here to be handled inside initializeHexTiles function.
	}
	// Reset goal
	var randomTile1 = hexTiles[Math.floor(Math.random() * hexTiles.length)];
	var randomTile2 = hexTiles[Math.floor(Math.random() * hexTiles.length)];
	while (randomTile1 === randomTile2) {
		randomTile2 = hexTiles[Math.floor(Math.random() * hexTiles.length)];
	}
	goalNumber = randomTile1.number + randomTile2.number;
	goalText.setText(goalNumber);
	// Reset combinations
	correctCombinations = 0;
	for (var i = 0; i < hexTiles.length; i++) {
		for (var j = i + 1; j < hexTiles.length; j++) {
			if (hexTiles[i].number + hexTiles[j].number === goalNumber) {
				correctCombinations++;
			}
		}
	}
	combinationsText.setText(correctGuess + '/' + correctCombinations);
}
var level = 1;
var levelText = new Text2('Level ' + level, {
	size: 75,
	fill: '#ffffff',
	alpha: 0 // Make level text invisible initially
});
levelText.anchor.set(1, 0);
// Hide level text on game start
levelText.visible = false;
LK.gui.topRight.addChild(levelText);
correctGuess = 0;
var correctGuess = 0;
var lives = 3;
var lifeIcons = [];
for (var i = 0; i < lives; i++) {
	var lifeIcon = LK.getAsset('lifeIcon', {
		anchorX: 1,
		anchorY: 0,
		x: -i * 90,
		y: 100,
		alpha: 0 // Make life icons invisible initially
	});
	LK.gui.topRight.addChild(lifeIcon);
	lifeIcons.push(lifeIcon);
}
var countdown = 15;
if (hexTiles) {
	for (var i = 0; i < hexTiles.length; i++) {
		hexTiles[i].interactive = false;
	}
}
var countdownText = new Text2(countdown, {
	size: 300,
	fill: '#ffffff',
	alpha: 0 // Make invisible initially
});
countdownText.visible = false;
countdownText.anchor.set(0.5, 1);
LK.gui.top.addChild(countdownText);
var countdownInterval = LK.setInterval(function () {
	if (playerTouchedScreen) {
		countdown--;
		if (countdown <= 0) {
			for (var i = 0; i < hexTiles.length; i++) {
				hexTiles[i].interactive = true;
			}
			countdownText.alpha = 0;
			goalText.visible = true;
			combinationsText.visible = true;
			LK.clearInterval(countdownInterval);
			for (var i = 0; i < hexTiles.length; i++) {
				hexTiles[i].getChildAt(1).setText('');
			}
		} else {
			countdownText.setText(countdown);
		}
	}
}, 1000);
countdownText.y += 550;
//var scoreText = new Text2('Score: 0', {
//	size: 75,
//	fill: '#ffffff'
//});
//scoreText.anchor.set(0.5, 0);
//LK.gui.top.addChild(scoreText);
// Create goal number and display it below the score
if (hexTiles && hexTiles.length > 1) {
	sumOfNeighbours = hexTiles[hexTiles.length - 2].number + hexTiles[hexTiles.length - 1].number;
}
// sumText initialization moved to after hexTiles initialization
var sumOfNeighbours = 0;
var hexTiles = [];
var selectedTiles = [];
var guessedPairs = {};
var gridRows = [];
function initializeHexTiles() {
	function initializeHexTiles() {
		// Define gridRows based on the current game level
		var gridRows;
		if (level <= 2) {
			gridRows = [2, 3, 2];
		} else if (level === 3) {
			gridRows = [3, 4, 3];
		} else if (level === 4) {
			gridRows = [4, 5, 4];
		} else {
			// Default to the highest defined grid for levels beyond those explicitly defined
			gridRows = [3, 4, 5, 4, 3];
		}
		var tileSpacingX = 250;
		var tileSpacingY = 210;
		var startX = (2048 - Math.max.apply(Math, gridRows) * tileSpacingX) / 2 + tileSpacingX / 2;
		var startY = (2732 - gridRows.length * tileSpacingY) / 2 + tileSpacingY / 2;
		// Initialize hex tiles
		for (var i = 0; i < gridRows.length; i++) {
			for (var j = 0; j < gridRows[i]; j++) {
				var hexTile = new HexTile(i * gridRows.length + j);
				var numberRange;
				if (level <= 2) {
					numberRange = 3;
				} else if (level <= 5) {
					numberRange = 9;
				} else {
					numberRange = 12;
				}
				hexTile.setNumber(Math.floor(Math.random() * numberRange) + 1);
				hexTile.x = startX + j * tileSpacingX + (Math.max.apply(Math, gridRows) - gridRows[i]) * tileSpacingX / 2;
				hexTile.y = startY + i * tileSpacingY;
				game.addChild(hexTile);
				hexTiles.push(hexTile);
				(function (hexTile) {
					hexTile.on('down', function (obj) {
						if (countdown > 0) {
							return;
						}
						if (selectedTiles.length < 2) {
							hexTile.toggleSelect();
							if (hexTile.isSelected) {
								selectedTiles.push(hexTile);
								if (selectedTiles.length == 2) {
									if (selectedTiles[0].number + selectedTiles[1].number === goalNumber) {
										var pairId = [selectedTiles[0].id, selectedTiles[1].id].sort().join('-');
										if (!guessedPairs[pairId]) {
											LK.setScore(LK.getScore() + 1);
											// Removed undefined reference to scoreText
											// scoreText.setText('Score: ' + LK.getScore());
											guessedPairs[pairId] = true;
											correctGuess++;
											combinationsText.setText(correctGuess + '/' + correctCombinations);
										}
										LK.setTimeout(function () {
											if (selectedTiles.length > 0) {
												selectedTiles[0].toggleSelect();
											}
											if (selectedTiles.length > 1) {
												selectedTiles[1].toggleSelect();
											}
											selectedTiles = [];
										}, 300);
										if (correctGuess === correctCombinations) {
											level++;
											correctGuess = 0;
											guessedPairs = {};
											combinationsText.setText(correctGuess + '/' + correctCombinations);
											levelText.setText('Level ' + level);
											countdown = 15;
											goalText.visible = false;
											combinationsText.visible = false;
											countdownText.alpha = 1;
											countdownText.setText(countdown);
											LK.clearInterval(countdownInterval);
											countdownInterval = LK.setInterval(function () {
												countdown--;
												if (countdown <= 0) {
													countdownText.alpha = 0;
													goalText.visible = true;
													combinationsText.visible = true;
													LK.clearInterval(countdownInterval);
													for (var i = 0; i < hexTiles.length; i++) {
														hexTiles[i].getChildAt(1).setText('');
													}
												} else {
													countdownText.setText(countdown);
												}
											}, 1000);
											LK.effects.flashScreen(0x90EE90, 500);
											// Remove previous hex tiles
											for (var i = 0; i < hexTiles.length; i++) {
												hexTiles[i].destroy();
											}
											hexTiles = [];
											initializeHexTiles();
											// Update goal and guesses with new numbers on the new grid
											// Ensure a different random background color is chosen when the level changes, different from the previous one.
											var previousBackgroundColor = game.backgroundColor;
											var newColors = [0xADD8E6, 0xFAD7A5, 0xFFB6C1, 0xFFA07A, 0xB39BDB, 0x90EE90].filter(function (color) {
												return color !== previousBackgroundColor;
											});
											game.setBackgroundColor(newColors[Math.floor(Math.random() * newColors.length)]);
											var randomTile1 = hexTiles[Math.floor(Math.random() * hexTiles.length)];
											var randomTile2 = hexTiles[Math.floor(Math.random() * hexTiles.length)];
											while (randomTile1 === randomTile2) {
												randomTile2 = hexTiles[Math.floor(Math.random() * hexTiles.length)];
											}
											goalNumber = randomTile1.number + randomTile2.number;
											goalText.setText(goalNumber);
											// Reset combinations
											correctCombinations = 0;
											for (var i = 0; i < hexTiles.length; i++) {
												for (var j = i + 1; j < hexTiles.length; j++) {
													if (hexTiles[i].number + hexTiles[j].number === goalNumber) {
														correctCombinations++;
													}
												}
											}
											combinationsText.setText(correctGuess + '/' + correctCombinations);
										}
									} else {
										lives--;
										lifeIcons[lives].destroy();
										if (lives <= 0) {
											LK.showGameOver();
										} else {
											LK.effects.flashScreen(0xFFA07A, 500);
										}
										LK.setTimeout(function () {
											if (selectedTiles.length > 0) {
												selectedTiles[0].toggleSelect();
											}
											if (selectedTiles.length > 1) {
												selectedTiles[1].toggleSelect();
											}
											selectedTiles = [];
										}, 300);
									}
								}
							} else {
								var index = selectedTiles.indexOf(hexTile);
								if (index > -1) {
									selectedTiles.splice(index, 1);
								}
							}
						}
					});
				})(hexTile);
			}
		}
	}
	initializeHexTiles();
}
initializeHexTiles();
var randomTile1 = hexTiles[Math.floor(Math.random() * hexTiles.length)];
var randomTile2 = hexTiles[Math.floor(Math.random() * hexTiles.length)];
while (randomTile1 === randomTile2) {
	randomTile2 = hexTiles[Math.floor(Math.random() * hexTiles.length)];
}
var goalNumber = randomTile1.number + randomTile2.number;
var goalText = new Text2(goalNumber, {
	size: 300,
	fill: '#ffffff',
	alpha: 0 // Make invisible initially
});
goalText.visible = false;
goalText.anchor.set(0.5, 1);
goalText.y += 550;
LK.gui.top.addChild(goalText);
// Calculate the number of unique correct combinations
var correctCombinations = 0;
for (var i = 0; i < hexTiles.length; i++) {
	for (var j = i + 1; j < hexTiles.length; j++) {
		if (hexTiles[i].number + hexTiles[j].number === goalNumber) {
			correctCombinations++;
		}
	}
}
// Display the number of unique correct combinations below the goal
var combinationsText = new Text2(correctGuess + '/' + correctCombinations, {
	size: 200,
	fill: '#ffffff',
	alpha: 1 // Make visible
});
combinationsText.visible = false;
combinationsText.anchor.set(0.5, 0);
combinationsText.y += 1400;
LK.gui.top.addChild(combinationsText);
// Game tick function
LK.on('tick', function () {
	// Game logic that needs to be executed every frame
});

===================================================================
--- original.js
+++ change.js
@@ -23,12 +23,16 @@
 		numberText.setText(number.toString());
 	};
 	self.isSelected = false;
 	self.toggleSelect = function () {
-		if (!self.isSelected) {
-			self.isSelected = true;
-			hexGraphics.alpha = 0.5;
-			numberText.setText(self.number.toString());
+		if (!self.isSelected || selectedTiles.length < 2) {
+			self.isSelected = !self.isSelected;
+			hexGraphics.alpha = self.isSelected ? 0.5 : 1;
+			if (self.isSelected) {
+				numberText.setText(self.number.toString());
+			} else {
+				numberText.setText('');
+			}
 		}
 	};
 });