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

/**** 
* Classes
****/ 
// Ball Class
var Ball = Container.expand(function () {
	var self = Container.call(this);
	var ball = self.attachAsset('ball', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = ball.width / 2;
	// Ball velocity
	self.vx = 0;
	self.vy = 0;
	self.update = function () {
		self.x += self.vx;
		self.y += self.vy;
	};
	return self;
});
// Block Class
var Block = Container.expand(function () {
	var self = Container.call(this);
	// Color variety: assign a colorId based on blockType, but also randomize for more variety
	var colorIds = ['block', 'block2', 'block3'];
	var colorId;
	var r = Math.random();
	if (r < 0.1) {
		self.hitPoints = 3;
		colorId = 'block4'; // Unique color for 3-hit blocks
	} else if (r < 0.3) {
		self.hitPoints = 2;
		if (typeof self.blockType === "number" && self.blockType >= 1 && self.blockType <= 3) {
			colorId = colorIds[self.blockType - 1];
		} else {
			colorId = colorIds[Math.floor(Math.random() * colorIds.length)];
		}
	} else {
		self.hitPoints = 1;
		if (typeof self.blockType === "number" && self.blockType >= 1 && self.blockType <= 3) {
			colorId = colorIds[self.blockType - 1];
		} else {
			colorId = colorIds[Math.floor(Math.random() * colorIds.length)];
		}
	}
	var block = self.attachAsset(colorId, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = block.width;
	self.height = block.height;
	self.updateBlockVisual = function () {
		// Change tint or alpha based on hitPoints
		if (self.hitPoints === 3) {
			block.alpha = 1;
		} else if (self.hitPoints === 2) {
			block.alpha = 0.7;
		} else {
			block.alpha = 0.4;
		}
	};
	self.updateBlockVisual();
	return self;
});
// Platform (Paddle) Class
var Platform = Container.expand(function () {
	var self = Container.call(this);
	var plat = self.attachAsset('platform', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = plat.width;
	self.height = plat.height;
	return self;
});
// Powerup Class
var Powerup = Container.expand(function () {
	var self = Container.call(this);
	// Define multiple powerup types
	var types = [{
		type: 'enlarge',
		label: 'E',
		color: 'block2'
	}, {
		type: 'shrink',
		label: 'S',
		color: 'block3'
	}, {
		type: 'life',
		label: '♥',
		color: 'block'
	}, {
		type: 'slow',
		label: '⏳',
		color: 'block2'
	}, {
		type: 'fast',
		label: '⚡',
		color: 'block3'
	}];
	// Randomly pick a powerup type
	var chosen = types[Math.floor(Math.random() * types.length)];
	self.type = chosen.type;
	// Use different asset color for each powerup type
	var asset = self.attachAsset(chosen.color, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	asset.width = 100;
	asset.height = 60;
	// Add a text label for the powerup type
	var txt = new Text2(chosen.label, {
		size: 60,
		fill: "#fff"
	});
	txt.anchor.set(0.5, 0.5);
	txt.x = 0;
	txt.y = 0;
	self.addChild(txt);
	// Set speed
	self.vy = 10;
	self.update = function () {
		self.y += self.vy;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x222222
});

/**** 
* Game Code
****/ 
// Block (third color for variety)
// Block (second color for variety)
// Block
// Ball
// Platform (paddle)
// Game constants
var GAME_WIDTH = 2048;
var GAME_HEIGHT = 2732;
var PLATFORM_Y = GAME_HEIGHT - 200;
var BALL_START_Y = PLATFORM_Y - 80;
var BALL_SPEED = 18;
var BALL_MIN_ANGLE = Math.PI / 8; // ~22.5deg, to avoid too shallow
var BALL_MAX_ANGLE = Math.PI - Math.PI / 8;
var PLATFORM_SPEED = 60; // Not used, as platform is dragged directly
var BLOCK_ROWS = 5;
var BLOCK_COLS = 7;
var BLOCK_MARGIN_X = 30;
var BLOCK_MARGIN_Y = 30;
var BLOCK_TOP_OFFSET = 350;
var BLOCK_TYPES = [1, 2, 3];
// Game state
var platform;
var ball;
var blocks = [];
var powerups = []; // Track falling powerups
var score = 0;
var lives = 3;
var isBallLaunched = false;
var dragPlatform = false;
var lastTouchX = 0;
var scoreTxt;
var livesTxt;
// Helper: Reset ball to platform
function resetBall() {
	ball.x = platform.x;
	ball.y = BALL_START_Y;
	ball.vx = 0;
	ball.vy = 0;
	isBallLaunched = false;
	// Ball speed increases after level 10 for more challenge
	if (currentLevel >= 10) {
		BALL_SPEED = 24 + (currentLevel - 10) * 2;
		if (BALL_SPEED > 50) BALL_SPEED = 50;
	} else {
		BALL_SPEED = 18 + currentLevel * 2;
		if (BALL_SPEED > 40) BALL_SPEED = 40;
	}
}
// Helper: Launch ball
function launchBall() {
	if (!isBallLaunched) {
		// Randomize initial angle between 45 and 135 degrees (upwards)
		var angle = Math.PI / 4 + Math.random() * (Math.PI / 2);
		ball.vx = BALL_SPEED * Math.cos(angle);
		ball.vy = -BALL_SPEED * Math.sin(angle);
		isBallLaunched = true;
	}
}
// Helper: Clamp value
function clamp(val, min, max) {
	if (val < min) return min;
	if (val > max) return max;
	return val;
}
// Level patterns: 20 unique block layouts (1: block, 0: empty, 2/3: alt color)
var LEVEL_PATTERNS = [
// Level 1: Full grid
[[1, 1, 1, 1, 1, 1, 1], [1, 1, 1, 1, 1, 1, 1], [1, 1, 1, 1, 1, 1, 1], [1, 1, 1, 1, 1, 1, 1], [1, 1, 1, 1, 1, 1, 1]],
// Level 2: Checkerboard
[[1, 0, 1, 0, 1, 0, 1], [0, 1, 0, 1, 0, 1, 0], [1, 0, 1, 0, 1, 0, 1], [0, 1, 0, 1, 0, 1, 0], [1, 0, 1, 0, 1, 0, 1]],
// Level 3: Pyramid
[[0, 0, 0, 1, 0, 0, 0], [0, 0, 1, 1, 1, 0, 0], [0, 1, 1, 1, 1, 1, 0], [1, 1, 1, 1, 1, 1, 1], [0, 0, 0, 0, 0, 0, 0]],
// Level 4: Hollow rectangle
[[2, 2, 2, 2, 2, 2, 2], [2, 0, 0, 0, 0, 0, 2], [2, 0, 0, 0, 0, 0, 2], [2, 0, 0, 0, 0, 0, 2], [2, 2, 2, 2, 2, 2, 2]],
// Level 5: Diagonal
[[3, 0, 0, 0, 0, 0, 3], [0, 3, 0, 0, 0, 3, 0], [0, 0, 3, 0, 3, 0, 0], [0, 0, 0, 3, 0, 0, 0], [0, 0, 3, 0, 3, 0, 0]],
// Level 6: Two triangles
[[1, 0, 0, 0, 0, 0, 1], [1, 1, 0, 0, 0, 1, 1], [1, 1, 1, 0, 1, 1, 1], [1, 1, 0, 0, 0, 1, 1], [1, 0, 0, 0, 0, 0, 1]],
// Level 7: Alternating rows
[[1, 2, 1, 2, 1, 2, 1], [2, 1, 2, 1, 2, 1, 2], [1, 2, 1, 2, 1, 2, 1], [2, 1, 2, 1, 2, 1, 2], [1, 2, 1, 2, 1, 2, 1]],
// Level 8: Center cross
[[0, 0, 3, 3, 3, 0, 0], [0, 0, 3, 3, 3, 0, 0], [3, 3, 3, 3, 3, 3, 3], [0, 0, 3, 3, 3, 0, 0], [0, 0, 3, 3, 3, 0, 0]],
// Level 9: Edges only
[[1, 1, 1, 1, 1, 1, 1], [1, 0, 0, 0, 0, 0, 1], [1, 0, 0, 0, 0, 0, 1], [1, 0, 0, 0, 0, 0, 1], [1, 1, 1, 1, 1, 1, 1]],
// Level 10: Zigzag
[[1, 0, 0, 0, 0, 0, 1], [0, 1, 0, 0, 0, 1, 0], [0, 0, 1, 0, 1, 0, 0], [0, 1, 0, 0, 0, 1, 0], [1, 0, 0, 0, 0, 0, 1]],
// Level 11: Dense center
[[0, 0, 1, 1, 1, 0, 0], [0, 1, 1, 1, 1, 1, 0], [1, 1, 2, 2, 2, 1, 1], [0, 1, 1, 1, 1, 1, 0], [0, 0, 1, 1, 1, 0, 0]],
// Level 12: Alternating columns
[[1, 2, 1, 2, 1, 2, 1], [1, 2, 1, 2, 1, 2, 1], [1, 2, 1, 2, 1, 2, 1], [1, 2, 1, 2, 1, 2, 1], [1, 2, 1, 2, 1, 2, 1]],
// Level 13: Arrow
[[0, 0, 0, 3, 0, 0, 0], [0, 0, 3, 3, 3, 0, 0], [0, 3, 3, 3, 3, 3, 0], [3, 3, 3, 3, 3, 3, 3], [0, 0, 0, 0, 0, 0, 0]],
// Level 14: Corners
[[2, 0, 0, 0, 0, 0, 2], [0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0], [2, 0, 0, 0, 0, 0, 2]],
// Level 15: Double cross
[[0, 2, 0, 2, 0, 2, 0], [2, 2, 2, 2, 2, 2, 2], [0, 2, 0, 2, 0, 2, 0], [2, 2, 2, 2, 2, 2, 2], [0, 2, 0, 2, 0, 2, 0]],
// Level 16: X shape
[[3, 0, 0, 0, 0, 0, 3], [0, 3, 0, 0, 0, 3, 0], [0, 0, 3, 0, 3, 0, 0], [0, 3, 0, 0, 0, 3, 0], [3, 0, 0, 0, 0, 0, 3]],
// Level 17: Center diamond
[[0, 0, 1, 0, 1, 0, 0], [0, 1, 1, 1, 1, 1, 0], [1, 1, 2, 2, 2, 1, 1], [0, 1, 1, 1, 1, 1, 0], [0, 0, 1, 0, 1, 0, 0]],
// Level 18: Top and bottom
[[1, 1, 1, 1, 1, 1, 1], [0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0], [1, 1, 1, 1, 1, 1, 1]],
// Level 19: Alternating blocks
[[1, 0, 2, 0, 3, 0, 1], [0, 2, 0, 3, 0, 1, 0], [2, 0, 3, 0, 1, 0, 2], [0, 3, 0, 1, 0, 2, 0], [3, 0, 1, 0, 2, 0, 3]],
// Level 20: Dense grid
[[1, 2, 3, 1, 2, 3, 1], [2, 3, 1, 2, 3, 1, 2], [3, 1, 2, 3, 1, 2, 3], [1, 2, 3, 1, 2, 3, 1], [2, 3, 1, 2, 3, 1, 2]]];
var currentLevel = 0;
var MAX_LEVEL = LEVEL_PATTERNS.length;
// Helper: Create blocks
function createBlocks() {
	// Remove old blocks
	for (var i = 0; i < blocks.length; i++) {
		blocks[i].destroy();
	}
	blocks = [];
	// Calculate block size and spacing
	var blockAsset = LK.getAsset('block', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var blockW = blockAsset.width;
	var blockH = blockAsset.height;
	var totalW = BLOCK_COLS * blockW + (BLOCK_COLS - 1) * BLOCK_MARGIN_X;
	var startX = (GAME_WIDTH - totalW) / 2 + blockW / 2;
	// Use pattern for current level
	var pattern = LEVEL_PATTERNS[currentLevel % LEVEL_PATTERNS.length];
	// Add more rows as level increases (up to 8)
	var extraRows = Math.min(Math.floor(currentLevel / 2), 3);
	for (var row = 0; row < BLOCK_ROWS + extraRows; row++) {
		for (var col = 0; col < BLOCK_COLS; col++) {
			var type = pattern[row] && pattern[row][col] ? pattern[row][col] : 0;
			if (type === 0) continue;
			var b = new Block();
			b.blockType = type;
			// Remove any previous children (for safety)
			b.removeChildren();
			// Assign a random colorId for each block for more color variety
			var colorIds = ['block', 'block2', 'block3'];
			var colorId;
			if (typeof b.blockType === "number" && b.blockType >= 1 && b.blockType <= 3) {
				// Pick a random color, but prefer the type's color
				colorId = colorIds[Math.floor(Math.random() * colorIds.length)];
			} else {
				colorId = colorIds[Math.floor(Math.random() * colorIds.length)];
			}
			b.attachAsset(colorId, {
				anchorX: 0.5,
				anchorY: 0.5
			});
			b.x = startX + col * (blockW + BLOCK_MARGIN_X);
			b.y = BLOCK_TOP_OFFSET + row * (blockH + BLOCK_MARGIN_Y);
			game.addChild(b);
			blocks.push(b);
		}
	}
}
// Helper: Reset game state
function resetGame() {
	score = 0;
	lives = 3;
	currentLevel = 0;
	LK.setScore(0);
	if (scoreTxt) scoreTxt.setText('0');
	if (livesTxt) livesTxt.setText('♥♥♥');
	createBlocks();
	// Increase ball speed with level (capped for sanity)
	BALL_SPEED = 18 + currentLevel * 2;
	if (BALL_SPEED > 40) BALL_SPEED = 40;
	// Reduce platform width as level increases (min 200)
	platform.width = 400 - currentLevel * 20;
	if (platform.width < 200) platform.width = 200;
	resetBall();
}
// Helper: Update lives display
function updateLives() {
	var s = '';
	for (var i = 0; i < lives; i++) s += '♥';
	livesTxt.setText(s);
}
// Helper: Ball-Block collision
function ballBlockCollision(ball, block) {
	// AABB collision
	var dx = Math.abs(ball.x - block.x);
	var dy = Math.abs(ball.y - block.y);
	var bw = block.width / 2;
	var bh = block.height / 2;
	var br = ball.radius;
	if (dx > bw + br) return false;
	if (dy > bh + br) return false;
	// Find overlap
	var overlapX = bw + br - dx;
	var overlapY = bh + br - dy;
	if (overlapX > 0 && overlapY > 0) {
		// Determine collision side: reflect ball accordingly
		if (overlapX < overlapY) {
			ball.vx = -ball.vx;
		} else {
			ball.vy = -ball.vy;
		}
		// After bounce, normalize speed to keep it constant
		var angle = Math.atan2(ball.vy, ball.vx);
		ball.vx = BALL_SPEED * Math.cos(angle);
		ball.vy = BALL_SPEED * Math.sin(angle);
		return true;
	}
	return false;
}
// Helper: Ball-Platform collision
function ballPlatformCollision(ball, platform) {
	// AABB collision
	var dx = Math.abs(ball.x - platform.x);
	var dy = Math.abs(ball.y - platform.y);
	var pw = platform.width / 2;
	var ph = platform.height / 2;
	var br = ball.radius;
	if (dx > pw + br) return false;
	if (dy > ph + br) return false;
	// Only reflect if ball is moving down
	if (ball.vy > 0) {
		// Calculate hit position (-1 left, 0 center, 1 right)
		var hit = (ball.x - platform.x) / pw;
		// Clamp hit
		hit = clamp(hit, -1, 1);
		// Reflect angle: 150deg (left) to 30deg (right)
		var angle = Math.PI - Math.PI / 3 * (hit + 1) / 2; // 150 to 30 deg
		ball.vx = BALL_SPEED * Math.cos(angle);
		ball.vy = -BALL_SPEED * Math.sin(angle);
		// After bounce, normalize speed to keep it constant
		var norm = Math.sqrt(ball.vx * ball.vx + ball.vy * ball.vy);
		if (norm !== 0) {
			ball.vx = BALL_SPEED * (ball.vx / norm);
			ball.vy = BALL_SPEED * (ball.vy / norm);
		}
	}
	return true;
}
// Helper: Ball-Wall collision
function ballWallCollision(ball) {
	// Left wall
	if (ball.x - ball.radius < 0) {
		ball.x = ball.radius;
		// Calculate current angle
		var angle = Math.atan2(ball.vy, -ball.vx);
		// Clamp angle to avoid too shallow (force more vertical)
		if (Math.abs(angle) < BALL_MIN_ANGLE) {
			angle = BALL_MIN_ANGLE * (ball.vy < 0 ? -1 : 1);
		}
		ball.vx = BALL_SPEED * Math.cos(angle);
		ball.vy = BALL_SPEED * Math.sin(angle);
	}
	// Right wall
	if (ball.x + ball.radius > GAME_WIDTH) {
		ball.x = GAME_WIDTH - ball.radius;
		// Calculate current angle
		var angle = Math.atan2(ball.vy, -ball.vx);
		// Clamp angle to avoid too shallow (force more vertical)
		if (Math.abs(angle) < BALL_MIN_ANGLE) {
			angle = BALL_MIN_ANGLE * (ball.vy < 0 ? -1 : 1);
		}
		ball.vx = BALL_SPEED * Math.cos(angle);
		ball.vy = BALL_SPEED * Math.sin(angle);
	}
	// Top wall
	if (ball.y - ball.radius < 0) {
		ball.y = ball.radius;
		ball.vy = -ball.vy;
	}
}
// Helper: Ball out of bounds
function ballOutOfBounds(ball) {
	return ball.y - ball.radius > GAME_HEIGHT;
}
// GUI: Score
scoreTxt = new Text2('0', {
	size: 120,
	fill: "#fff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// GUI: Lives
livesTxt = new Text2('♥♥♥', {
	size: 100,
	fill: 0xE74C3C
});
livesTxt.anchor.set(1, 0);
LK.gui.topRight.addChild(livesTxt);
// Create platform
platform = new Platform();
platform.x = GAME_WIDTH / 2;
platform.y = PLATFORM_Y;
game.addChild(platform);
// Create ball
ball = new Ball();
resetBall();
game.addChild(ball);
// Create blocks
createBlocks();
// Input: Drag platform
game.down = function (x, y, obj) {
	// Only allow drag if touch is near platform
	if (Math.abs(y - platform.y) < 200) {
		dragPlatform = true;
		lastTouchX = x;
		// If ball not launched, move ball with platform
		if (!isBallLaunched) {
			ball.x = platform.x;
		}
	}
};
game.move = function (x, y, obj) {
	if (dragPlatform) {
		// Move platform horizontally, clamp to screen
		platform.x = clamp(x, platform.width / 2, GAME_WIDTH - platform.width / 2);
		// If ball not launched, move ball with platform
		if (!isBallLaunched) {
			ball.x = platform.x;
		}
	}
};
game.up = function (x, y, obj) {
	if (dragPlatform) {
		// On release, if ball not launched, launch it
		if (!isBallLaunched) {
			launchBall();
		}
		dragPlatform = false;
	}
};
// Main game loop
game.update = function () {
	// Ball movement
	if (isBallLaunched) {
		ball.update();
		ballWallCollision(ball);
		// Platform collision
		ballPlatformCollision(ball, platform);
		// Block collisions
		for (var i = blocks.length - 1; i >= 0; i--) {
			if (ballBlockCollision(ball, blocks[i])) {
				// Decrement hit points
				blocks[i].hitPoints--;
				if (blocks[i].hitPoints > 0) {
					// Update visual feedback
					if (typeof blocks[i].updateBlockVisual === "function") {
						blocks[i].updateBlockVisual();
					}
				} else {
					// Powerup drop chance decreases as level increases (min 5%)
					var powerupChance = 0.25 - currentLevel * 0.02;
					if (powerupChance < 0.05) powerupChance = 0.05;
					if (Math.random() < powerupChance) {
						var p = new Powerup();
						p.x = blocks[i].x;
						p.y = blocks[i].y;
						game.addChild(p);
						powerups.push(p);
					}
					blocks[i].destroy();
					blocks.splice(i, 1);
					score += 10;
					LK.setScore(score);
					scoreTxt.setText(score);
				}
				break; // Only one block per frame
			}
		}
		// Powerup logic
		for (var i = powerups.length - 1; i >= 0; i--) {
			var p = powerups[i];
			p.update();
			// If powerup intersects platform, apply effect
			if (p.intersects(platform)) {
				// Activate powerup effect
				if (p.type === 'enlarge') {
					// Enlarge platform for 10 seconds
					var originalWidth = platform.width;
					platform.width *= 1.5;
					if (platform.width > 800) platform.width = 800;
					// Schedule shrink after 10 seconds
					LK.setTimeout(function () {
						// Only shrink if platform is still enlarged
						if (platform.width > originalWidth) {
							platform.width = originalWidth;
						}
					}, 10000);
				} else if (p.type === 'shrink') {
					// Shrink platform for 10 seconds
					var originalWidth = platform.width;
					platform.width *= 0.6;
					if (platform.width < 120) platform.width = 120;
					LK.setTimeout(function () {
						if (platform.width < originalWidth) {
							platform.width = originalWidth;
						}
					}, 10000);
				} else if (p.type === 'life') {
					// Add a life (max 5)
					if (lives < 5) {
						lives++;
						updateLives();
					}
				} else if (p.type === 'slow') {
					// Slow down ball for 8 seconds
					var oldSpeed = BALL_SPEED;
					BALL_SPEED = Math.max(10, BALL_SPEED * 0.6);
					// Adjust ball velocity to new speed
					var angle = Math.atan2(ball.vy, ball.vx);
					ball.vx = BALL_SPEED * Math.cos(angle);
					ball.vy = BALL_SPEED * Math.sin(angle);
					LK.setTimeout(function () {
						BALL_SPEED = oldSpeed;
						// Re-adjust ball velocity to restored speed
						var angle2 = Math.atan2(ball.vy, ball.vx);
						ball.vx = BALL_SPEED * Math.cos(angle2);
						ball.vy = BALL_SPEED * Math.sin(angle2);
					}, 8000);
				} else if (p.type === 'fast') {
					// Speed up ball for 8 seconds
					var oldSpeed = BALL_SPEED;
					BALL_SPEED = Math.min(50, BALL_SPEED * 1.5);
					var angle = Math.atan2(ball.vy, ball.vx);
					ball.vx = BALL_SPEED * Math.cos(angle);
					ball.vy = BALL_SPEED * Math.sin(angle);
					LK.setTimeout(function () {
						BALL_SPEED = oldSpeed;
						var angle2 = Math.atan2(ball.vy, ball.vx);
						ball.vx = BALL_SPEED * Math.cos(angle2);
						ball.vy = BALL_SPEED * Math.sin(angle2);
					}, 8000);
				}
				p.destroy();
				powerups.splice(i, 1);
				continue;
			}
			// Remove if out of bounds
			if (p.y > GAME_HEIGHT + 100) {
				p.destroy();
				powerups.splice(i, 1);
			}
		}
		// Win condition: all blocks destroyed
		if (blocks.length === 0) {
			currentLevel++;
			if (currentLevel >= MAX_LEVEL) {
				LK.showYouWin();
				return;
			} else {
				createBlocks();
				resetBall();
				return;
			}
		}
		// Ball out of bounds
		if (ballOutOfBounds(ball)) {
			lives--;
			updateLives();
			if (lives <= 0) {
				LK.showGameOver();
				return;
			}
			resetBall();
		}
	}
};
// --- Level Selection Screen ---
var levelSelectContainers = [];
function showLevelSelect() {
	// Remove any previous containers
	for (var i = 0; i < levelSelectContainers.length; i++) {
		levelSelectContainers[i].destroy();
	}
	levelSelectContainers = [];
	// Title
	var title = new Text2("Bölüm Seç", {
		size: 180,
		fill: "#fff"
	});
	title.anchor.set(0.5, 0);
	title.x = GAME_WIDTH / 2;
	title.y = 300;
	game.addChild(title);
	levelSelectContainers.push(title);
	// Level buttons (arrange in 4 rows of 5)
	var btnW = 320,
		btnH = 180,
		gapX = 80,
		gapY = 80;
	var totalW = 5 * btnW + 4 * gapX;
	var startX = (GAME_WIDTH - totalW) / 2 + btnW / 2;
	var startY = 700;
	for (var i = 0; i < MAX_LEVEL; i++) {
		(function (levelIdx) {
			var btn = new Container();
			var bg = LK.getAsset('block', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			bg.width = btnW;
			bg.height = btnH;
			btn.addChild(bg);
			// Color variety
			if (levelIdx % 3 === 1) bg.tint = 0x2ecc71;
			if (levelIdx % 3 === 2) bg.tint = 0x9b59b6;
			var txt = new Text2((levelIdx + 1).toString(), {
				size: 100,
				fill: "#fff"
			});
			txt.anchor.set(0.5, 0.5);
			txt.x = 0;
			txt.y = 0;
			btn.addChild(txt);
			// Position (4 rows of 5)
			btn.x = startX + levelIdx % 5 * (btnW + gapX);
			btn.y = startY + Math.floor(levelIdx / 5) * (btnH + gapY);
			// Touch handler
			btn.down = function (x, y, obj) {
				hideLevelSelect();
				startGameAtLevel(levelIdx);
			};
			game.addChild(btn);
			levelSelectContainers.push(btn);
		})(i);
	}
}
function hideLevelSelect() {
	for (var i = 0; i < levelSelectContainers.length; i++) {
		levelSelectContainers[i].destroy();
	}
	levelSelectContainers = [];
}
// Start game at selected level
function startGameAtLevel(levelIdx) {
	currentLevel = levelIdx;
	score = 0;
	lives = 3;
	LK.setScore(0);
	if (scoreTxt) scoreTxt.setText('0');
	if (livesTxt) livesTxt.setText('♥♥♥');
	createBlocks();
	resetBall();
}
// --- Override resetGame to show level select ---
resetGame = function resetGame() {
	showLevelSelect();
};
// Show level select on game start
showLevelSelect();