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

/**** 
* Classes
****/ 
// Ball class
var Ball = Container.expand(function () {
	var self = Container.call(this);
	var ballGfx = self.attachAsset('ball', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = ballGfx.width / 2;
	self.vx = 0;
	self.vy = 0;
	self.speed = 22;
	self.stuck = true; // Ball stuck to paddle at start
	self.update = function () {
		if (self.stuck) {
			// Ball follows paddle
			self.x = paddle.x;
			self.y = paddle.y - paddle.height / 2 - self.radius;
			return;
		}
		self.x += self.vx;
		self.y += self.vy;
	};
	return self;
});
// Block class
var Block = Container.expand(function () {
	var self = Container.call(this);
	self.type = 1; // 1: normal, 2: strong, 3: indestructible
	self.hits = 1;
	self.destroyed = false;
	self.powerup = false;
	self.setType = function (type) {
		self.type = type;
		if (type === 1) {
			self.attachAsset('block1', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			self.hits = 1;
		} else if (type === 2) {
			self.attachAsset('block2', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			self.hits = 2;
		} else if (type === 3) {
			self.attachAsset('blockInd', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			self.hits = 9999;
		}
	};
	return self;
});
// HeartCircle class for animated heart lives
var HeartCircle = Container.expand(function () {
	var self = Container.call(this);
	var heartGfx = self.attachAsset('heartCircle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = 60;
	self.angle = 0;
	self.setPosition = function (cx, cy, r, angle) {
		self.x = cx + r * Math.cos(angle);
		self.y = cy + r * Math.sin(angle);
	};
	self.setScale = function (scale) {
		self.scaleX = self.scaleY = scale;
	};
	return self;
});
// Paddle class
var Paddle = Container.expand(function () {
	var self = Container.call(this);
	var paddleGfx = self.attachAsset('paddle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = paddleGfx.width;
	self.height = paddleGfx.height;
	self.extended = false;
	self.extensionTimeout = null;
	self.extend = function () {
		if (self.extended) return;
		self.extended = true;
		tween(self, {
			scaleX: 1.7
		}, {
			duration: 300,
			easing: tween.easeOut
		});
		if (self.extensionTimeout) LK.clearTimeout(self.extensionTimeout);
		self.extensionTimeout = LK.setTimeout(function () {
			tween(self, {
				scaleX: 1
			}, {
				duration: 300,
				easing: tween.easeIn
			});
			self.extended = false;
		}, 7000);
	};
	return self;
});
// Powerup class
var Powerup = Container.expand(function () {
	var self = Container.call(this);
	var gfx = self.attachAsset('powerup', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// 10 powerup types
	var types = ['extend',
	// 0: Extend paddle
	'shrink',
	// 1: Shrink paddle
	'multi',
	// 2: Multi-ball
	'slow',
	// 3: Slow ball
	'fast',
	// 4: Fast ball
	'catch',
	// 5: Sticky paddle
	'life',
	// 6: Extra life
	'bigball',
	// 7: Big ball
	'smallball',
	// 8: Small ball
	'score' // 9: Bonus score
	];
	// Randomly assign type if not set
	self.type = types[Math.floor(Math.random() * types.length)];
	self.vy = 10;
	self.update = function () {
		self.y += self.vy;
	};
	// Set color based on type for visual feedback
	var colorMap = {
		'extend': 0x44ff44,
		'shrink': 0xff4444,
		'multi': 0x44aaff,
		'slow': 0x8888ff,
		'fast': 0xffaa00,
		'catch': 0xff00ff,
		'life': 0xffe066,
		'bigball': 0x00ffff,
		'smallball': 0x888888,
		'score': 0xffffff
	};
	if (gfx) gfx.tint = colorMap[self.type] || 0x44ff44;
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x181830
});

/**** 
* Game Code
****/ 
// background asset
// Game constants 
// Ball: white circle
// Paddle: blue rectangle
// Block: colored rectangle (normal)
// Block: strong (2 hits)
// Block: indestructible
// Powerup: green circle
var GAME_W = 2048;
var GAME_H = 2732;
// Add background image to the game scene
var background = LK.getAsset('background', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: GAME_W / 2,
	y: GAME_H / 2,
	scaleX: GAME_W / LK.getAsset('background', {}).width,
	scaleY: GAME_H / LK.getAsset('background', {}).height,
	alpha: 1
});
game.addChildAt(background, 0);
var BLOCK_ROWS = 4;
var BLOCK_COLS = 6;
var BLOCK_MARGIN_X = 8;
var BLOCK_MARGIN_Y = 24;
var BLOCK_START_Y = 320;
var LIVES_START = 3;
// Game state
var paddle, ball;
var blocks = [];
var powerups = [];
var lives = LIVES_START;
var score = 0;
var balls = [];
var isLaunching = false;
var lastTouchX = GAME_W / 2;
var gameOver = false;
// GUI
var scoreTxt = new Text2('0', {
	size: 100,
	fill: "#fff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Level text for displaying current level (used in level transitions)
var levelText = null;
// Heart circle lives
var heartCircles = [];
var heartCircleCenter = {
	x: GAME_W - 220,
	y: 120
};
var heartCircleRadius = 90;
var heartCircleScale = 1.0;
// Helper: update GUI
function updateScore() {
	scoreTxt.setText(score);
}
function updateLives() {
	// Remove old hearts
	for (var i = 0; i < heartCircles.length; ++i) {
		heartCircles[i].destroy();
	}
	heartCircles = [];
	// Place hearts in a circle, one after another
	var total = lives;
	var baseAngle = -Math.PI / 2;
	for (var i = 0; i < total; ++i) {
		var hc = new HeartCircle();
		var angle = baseAngle + i * (Math.PI * 2) / Math.max(3, total);
		hc.setPosition(heartCircleCenter.x, heartCircleCenter.y, heartCircleRadius, angle);
		hc.setScale(1.0);
		LK.gui.topRight.addChild(hc);
		heartCircles.push(hc);
	}
}
// Helper: reset game state
function resetGame() {
	// Remove old blocks
	for (var i = 0; i < blocks.length; ++i) blocks[i].destroy();
	blocks = [];
	// Remove old balls
	for (var i = 0; i < balls.length; ++i) balls[i].destroy();
	balls = [];
	// Remove powerups
	for (var i = 0; i < powerups.length; ++i) powerups[i].destroy();
	powerups = [];
	// Reset score/lives
	score = 0;
	lives = LIVES_START;
	updateScore();
	updateLives();
	gameOver = false;
	// Create blocks
	var blockW = LK.getAsset('block1', {}).width;
	var blockH = LK.getAsset('block1', {}).height;
	var blockIndW = LK.getAsset('blockInd', {}).width;
	var blockIndH = LK.getAsset('blockInd', {}).height;
	var totalW = BLOCK_COLS * blockW + (BLOCK_COLS - 1) * BLOCK_MARGIN_X;
	var startX = (GAME_W - totalW) / 2 + blockW / 2;
	for (var row = 0; row < BLOCK_ROWS; ++row) {
		for (var col = 0; col < BLOCK_COLS; ++col) {
			var b = new Block();
			// Use both block1 and block2 in every level, and make each level different
			// Example: alternate block1/block2, and shift pattern by level for variety
			var levelPattern = typeof currentLevel !== "undefined" ? currentLevel : 1;
			if ((row + col + levelPattern) % 2 === 0) {
				b.setType(1);
			} else {
				b.setType(2);
			}
			// Always use normal block size/position
			b.x = startX + col * (blockW + BLOCK_MARGIN_X);
			b.y = BLOCK_START_Y + row * (blockH + BLOCK_MARGIN_Y);
			b.width = blockW;
			b.height = blockH;
			// 15% chance to drop powerup
			if (Math.random() < 0.15) {
				// Assign a random type to the block's powerup property
				var powerupTypes = ['extend', 'shrink', 'multi', 'slow', 'fast', 'catch', 'life', 'bigball', 'smallball', 'score'];
				b.powerup = powerupTypes[Math.floor(Math.random() * powerupTypes.length)];
			}
			blocks.push(b);
			game.addChild(b);
		}
	}
	// Create paddle
	if (paddle) paddle.destroy();
	paddle = new Paddle();
	paddle.x = GAME_W / 2;
	paddle.y = GAME_H - 220;
	game.addChild(paddle);
	// Create ball
	spawnBall();
}
// Helper: spawn a new ball (stuck to paddle)
function spawnBall() {
	var b = new Ball();
	b.x = paddle.x;
	b.y = paddle.y - paddle.height / 2 - b.radius;
	b.stuck = true;
	b.vx = 0;
	b.vy = 0;
	balls.push(b);
	game.addChild(b);
	ball = b;
}
// Helper: launch ball
function launchBall() {
	if (!ball || !ball.stuck) return;
	var angle = (Math.random() * 0.5 + 0.25) * Math.PI; // 45-135 deg
	ball.vx = ball.speed * Math.cos(angle);
	ball.vy = -ball.speed * Math.abs(Math.sin(angle));
	ball.stuck = false;
}
// Helper: check collision (AABB)
function rectsIntersect(a, b) {
	return a.x - a.width / 2 < b.x + b.width / 2 && a.x + a.width / 2 > b.x - b.width / 2 && a.y - a.height / 2 < b.y + b.height / 2 && a.y + a.height / 2 > b.y - b.height / 2;
}
// Helper: check ball-block collision (circle-rect)
function ballBlockCollision(ball, block) {
	var bx = block.x,
		by = block.y,
		bw = block.width,
		bh = block.height;
	var cx = ball.x,
		cy = ball.y,
		r = ball.radius;
	// Clamp point
	var px = Math.max(bx - bw / 2, Math.min(cx, bx + bw / 2));
	var py = Math.max(by - bh / 2, Math.min(cy, by + bh / 2));
	var dx = cx - px,
		dy = cy - py;
	return dx * dx + dy * dy < r * r;
}
// Helper: reflect ball on block
function reflectBall(ball, block) {
	// Find side of collision
	var overlapX = block.x - block.width / 2 - (ball.x + ball.radius);
	var overlapY = block.y - block.height / 2 - (ball.y + ball.radius);
	var prevX = ball.x - ball.vx,
		prevY = ball.y - ball.vy;
	// Check which axis ball came from
	var fromLeft = prevX < block.x - block.width / 2;
	var fromRight = prevX > block.x + block.width / 2;
	var fromTop = prevY < block.y - block.height / 2;
	var fromBottom = prevY > block.y + block.height / 2;
	// Simple: invert vy if hit top/bottom, vx if hit left/right
	if (Math.abs(ball.vx) > Math.abs(ball.vy)) {
		ball.vx *= -1;
	} else {
		ball.vy *= -1;
	}
}
// Helper: reflect ball on paddle
function reflectBallPaddle(ball, paddle) {
	// Calculate hit position relative to paddle center (-1 to 1)
	var rel = (ball.x - paddle.x) / (paddle.width * (paddle.scaleX || 1) / 2);
	rel = Math.max(-1, Math.min(1, rel));
	var angle = rel * Math.PI / 3 + Math.PI / 2; // -60deg to +60deg from vertical
	var speed = ball.speed;
	ball.vx = speed * Math.sin(angle);
	ball.vy = -Math.abs(speed * Math.cos(angle));
}
// Helper: spawn powerup
function spawnPowerup(x, y, type) {
	var p = new Powerup();
	p.x = x;
	p.y = y;
	if (type) p.type = type;
	powerups.push(p);
	game.addChild(p);
}
// Game move handler (drag paddle)
game.move = function (x, y, obj) {
	if (gameOver) return;
	// Clamp paddle to screen
	var px = Math.max(paddle.width / 2, Math.min(GAME_W - paddle.width / 2, x));
	paddle.x = px;
	lastTouchX = px;
	// If ball is stuck, move it too
	for (var i = 0; i < balls.length; ++i) {
		if (balls[i].stuck) balls[i].x = px;
	}
};
// Game down handler (launch ball)
game.down = function (x, y, obj) {
	if (gameOver) return;
	if (ball && ball.stuck) {
		launchBall();
	}
};
// Main game update
game.update = function () {
	if (gameOver) return;
	// Update balls
	for (var i = balls.length - 1; i >= 0; --i) {
		var b = balls[i];
		b.update();
		// Wall collisions
		if (b.x - b.radius < 0) {
			b.x = b.radius;
			b.vx = Math.abs(b.vx);
		}
		if (b.x + b.radius > GAME_W) {
			b.x = GAME_W - b.radius;
			b.vx = -Math.abs(b.vx);
		}
		if (b.y - b.radius < 0) {
			b.y = b.radius;
			b.vy = Math.abs(b.vy);
		}
		// Paddle collision
		if (!b.stuck && rectsIntersect(b, paddle)) {
			reflectBallPaddle(b, paddle);
			// Nudge ball out of paddle
			b.y = paddle.y - paddle.height / 2 - b.radius - 2;
		}
		// Block collisions
		for (var j = blocks.length - 1; j >= 0; --j) {
			var block = blocks[j];
			if (block.destroyed) continue;
			if (ballBlockCollision(b, block)) {
				// Hit!
				if (block.type !== 3) {
					block.hits -= 1;
					if (block.hits <= 0) {
						block.destroyed = true;
						tween(block, {
							alpha: 0
						}, {
							duration: 200,
							onFinish: function onFinish() {
								block.destroy();
							}
						});
						blocks.splice(j, 1);
						score += 100;
						updateScore();
						// Powerup drop
						if (block.powerup) {
							spawnPowerup(block.x, block.y, block.powerup);
						}
						// Win condition
						var anyLeft = false;
						for (var k = 0; k < blocks.length; ++k) {
							if (blocks[k].type !== 3) {
								anyLeft = true;
								break;
							}
						}
						if (!anyLeft) {
							// Animate all remaining blocks out (milk animation)
							for (var m = 0; m < blocks.length; ++m) {
								var milkBlock = blocks[m];
								tween(milkBlock, {
									scaleY: 0.1,
									alpha: 0
								}, {
									duration: 500,
									easing: tween.easeIn,
									onFinish: function (blk) {
										return function () {
											blk.destroy();
										};
									}(milkBlock)
								});
							}
							blocks = [];
							// After animation, spawn a new wave of blocks for the next level
							LK.setTimeout(function () {
								// Level system: 30 levels, each with unique block patterns
								if (typeof currentLevel === "undefined") {
									currentLevel = 1;
								} else {
									currentLevel += 1;
								}
								if (currentLevel > 30) currentLevel = 30; // Cap at 30
								// Helper: get block type for a given level, row, col
								function getBlockTypeForLevel(level, row, col) {
									// Level 1-5: simple, more normal, some strong, rare indestructible
									if (level <= 5) {
										if (row === 0 && col % 2 === 0) return 2;
										if (row === 1 && col % 3 === 0) return 2;
										if (row === 2 && col % 5 === 0) return 3;
										return 1;
									}
									// Level 6-10: more strong, some indestructible
									if (level <= 10) {
										if ((row + col) % 4 === 0) return 3;
										if ((row + col) % 2 === 0) return 2;
										return 1;
									}
									// Level 11-15: checkerboard indestructible, strong
									if (level <= 15) {
										if ((row + col) % 2 === 0) return 3;
										if (row * col % 3 === 0) return 2;
										return 1;
									}
									// Level 16-20: border indestructible, center strong
									if (level <= 20) {
										if (row === 0 || row === BLOCK_ROWS - 1 || col === 0 || col === BLOCK_COLS - 1) return 3;
										if ((row + col) % 2 === 1) return 2;
										return 1;
									}
									// Level 21-25: stripes of indestructible, strong
									if (level <= 25) {
										if (col % 2 === 0) return 3;
										if (row % 2 === 0) return 2;
										return 1;
									}
									// Level 26-30: lots of indestructible, strong in center
									if (level <= 30) {
										if ((row === 1 || row === BLOCK_ROWS - 2) && (col === 2 || col === BLOCK_COLS - 3)) return 2;
										if ((row + col) % 2 === 0) return 3;
										return 1;
									}
									return 1;
								}
								// Helper: get powerup chance for a given level
								function getPowerupChanceForLevel(level) {
									if (level <= 5) return 0.20;
									if (level <= 10) return 0.18;
									if (level <= 15) return 0.16;
									if (level <= 20) return 0.14;
									if (level <= 25) return 0.12;
									return 0.10;
								}
								// Show level number (optional: can be removed if not wanted)
								if (!levelText) {
									levelText = new Text2('Level ' + currentLevel, {
										size: 120,
										fill: "#fff"
									});
									levelText.anchor.set(0.5, 0.5);
									LK.gui.center.addChild(levelText);
								} else {
									levelText.setText('Level ' + currentLevel);
									levelText.visible = true;
								}
								// Hide after 1s
								LK.setTimeout(function () {
									if (levelText) levelText.visible = false;
								}, 1000);
								// Block placement
								var blockW = LK.getAsset('block1', {}).width;
								var blockH = LK.getAsset('block1', {}).height;
								var blockIndW = LK.getAsset('blockInd', {}).width;
								var blockIndH = LK.getAsset('blockInd', {}).height;
								var totalW = BLOCK_COLS * blockW + (BLOCK_COLS - 1) * BLOCK_MARGIN_X;
								var startX = (GAME_W - totalW) / 2 + blockW / 2;
								for (var row = 0; row < BLOCK_ROWS; ++row) {
									for (var col = 0; col < BLOCK_COLS; ++col) {
										var b = new Block();
										// Use both block1 and block2 in every level, and make each level different
										// Example: alternate block1/block2, and shift pattern by level for variety
										if ((row + col + currentLevel) % 2 === 0) {
											b.setType(1);
										} else {
											b.setType(2);
										}
										// Always use normal block size/position
										b.x = startX + col * (blockW + BLOCK_MARGIN_X);
										b.y = BLOCK_START_Y + row * (blockH + BLOCK_MARGIN_Y);
										b.width = blockW;
										b.height = blockH;
										// Powerup chance by level
										var powerupChance = getPowerupChanceForLevel(currentLevel);
										if (Math.random() < powerupChance) b.powerup = true;
										blocks.push(b);
										game.addChild(b);
										// Animate in (milk drop)
										b.scaleY = 0.1;
										b.alpha = 0;
										tween(b, {
											scaleY: 1,
											alpha: 1
										}, {
											duration: 500,
											easing: tween.easeOut
										});
									}
								}
							}, 550); // Wait for milk animation out
							return;
						}
					}
				}
				// Flash block
				LK.effects.flashObject(block, 0xffffff, 100);
				// Reflect ball
				reflectBall(b, block);
				break;
			}
		}
		// Ball falls below paddle
		if (b.y - b.radius > GAME_H) {
			b.destroy();
			balls.splice(i, 1);
			if (balls.length === 0) {
				lives -= 1;
				updateLives();
				if (lives <= 0) {
					gameOver = true;
					LK.effects.flashScreen(0xff0000, 1000);
					LK.showGameOver();
					return;
				} else {
					spawnBall();
				}
			}
		}
	}
	// Update powerups
	for (var i = powerups.length - 1; i >= 0; --i) {
		var p = powerups[i];
		p.update();
		// Paddle catch
		if (rectsIntersect(p, paddle)) {
			// Powerup effect logic
			if (p.type === 'extend') {
				paddle.extend();
			} else if (p.type === 'shrink') {
				// Shrink paddle for 7s
				if (!paddle.shrunk) {
					paddle.shrunk = true;
					tween(paddle, {
						scaleX: 0.6
					}, {
						duration: 300,
						easing: tween.easeOut
					});
					if (paddle.shrinkTimeout) LK.clearTimeout(paddle.shrinkTimeout);
					paddle.shrinkTimeout = LK.setTimeout(function () {
						tween(paddle, {
							scaleX: 1
						}, {
							duration: 300,
							easing: tween.easeIn
						});
						paddle.shrunk = false;
					}, 7000);
				}
			} else if (p.type === 'multi') {
				// Multi-ball: spawn 2 extra balls
				for (var mb = 0; mb < 2; ++mb) {
					var newBall = new Ball();
					newBall.x = ball.x;
					newBall.y = ball.y;
					newBall.stuck = false;
					var angle = (Math.random() * 0.5 + 0.25) * Math.PI;
					newBall.vx = ball.speed * Math.cos(angle) * (Math.random() < 0.5 ? 1 : -1);
					newBall.vy = -ball.speed * Math.abs(Math.sin(angle));
					balls.push(newBall);
					game.addChild(newBall);
				}
			} else if (p.type === 'slow') {
				// Slow all balls for 7s
				for (var sb = 0; sb < balls.length; ++sb) {
					var b = balls[sb];
					if (!b.slowed) {
						b.slowed = true;
						b.speed = 12;
						var mag = Math.sqrt(b.vx * b.vx + b.vy * b.vy);
						if (mag > 0) {
							b.vx *= 12 / mag;
							b.vy *= 12 / mag;
						}
					}
				}
				if (!game.slowTimeout) {
					game.slowTimeout = LK.setTimeout(function () {
						for (var sb = 0; sb < balls.length; ++sb) {
							var b = balls[sb];
							if (b.slowed) {
								b.speed = 22;
								b.slowed = false;
								var mag = Math.sqrt(b.vx * b.vx + b.vy * b.vy);
								if (mag > 0) {
									b.vx *= 22 / mag;
									b.vy *= 22 / mag;
								}
							}
						}
						game.slowTimeout = null;
					}, 7000);
				}
			} else if (p.type === 'fast') {
				// Speed up all balls for 7s
				for (var fb = 0; fb < balls.length; ++fb) {
					var b = balls[fb];
					if (!b.fasted) {
						b.fasted = true;
						b.speed = 36;
						var mag = Math.sqrt(b.vx * b.vx + b.vy * b.vy);
						if (mag > 0) {
							b.vx *= 36 / mag;
							b.vy *= 36 / mag;
						}
					}
				}
				if (!game.fastTimeout) {
					game.fastTimeout = LK.setTimeout(function () {
						for (var fb = 0; fb < balls.length; ++fb) {
							var b = balls[fb];
							if (b.fasted) {
								b.speed = 22;
								b.fasted = false;
								var mag = Math.sqrt(b.vx * b.vx + b.vy * b.vy);
								if (mag > 0) {
									b.vx *= 22 / mag;
									b.vy *= 22 / mag;
								}
							}
						}
						game.fastTimeout = null;
					}, 7000);
				}
			} else if (p.type === 'catch') {
				// Sticky paddle for 7s
				paddle.sticky = true;
				if (paddle.stickyTimeout) LK.clearTimeout(paddle.stickyTimeout);
				paddle.stickyTimeout = LK.setTimeout(function () {
					paddle.sticky = false;
				}, 7000);
			} else if (p.type === 'life') {
				// Extra life
				lives += 1;
				updateLives();
			} else if (p.type === 'bigball') {
				// Make all balls big for 7s
				for (var bb = 0; bb < balls.length; ++bb) {
					var b = balls[bb];
					if (!b.bigged) {
						b.bigged = true;
						b.scaleX = b.scaleY = 1.5;
						b.radius = LK.getAsset('ball', {}).width * 0.75;
					}
				}
				if (!game.bigTimeout) {
					game.bigTimeout = LK.setTimeout(function () {
						for (var bb = 0; bb < balls.length; ++bb) {
							var b = balls[bb];
							if (b.bigged) {
								b.scaleX = b.scaleY = 1;
								b.radius = LK.getAsset('ball', {}).width / 2;
								b.bigged = false;
							}
						}
						game.bigTimeout = null;
					}, 7000);
				}
			} else if (p.type === 'smallball') {
				// Make all balls small for 7s
				for (var sb = 0; sb < balls.length; ++sb) {
					var b = balls[sb];
					if (!b.smalled) {
						b.smalled = true;
						b.scaleX = b.scaleY = 0.6;
						b.radius = LK.getAsset('ball', {}).width * 0.3;
					}
				}
				if (!game.smallTimeout) {
					game.smallTimeout = LK.setTimeout(function () {
						for (var sb = 0; sb < balls.length; ++sb) {
							var b = balls[sb];
							if (b.smalled) {
								b.scaleX = b.scaleY = 1;
								b.radius = LK.getAsset('ball', {}).width / 2;
								b.smalled = false;
							}
						}
						game.smallTimeout = null;
					}, 7000);
				}
			} else if (p.type === 'score') {
				// Bonus score
				score += 500;
				updateScore();
			}
			p.destroy();
			powerups.splice(i, 1);
		} else if (p.y - p.height / 2 > GAME_H) {
			p.destroy();
			powerups.splice(i, 1);
		}
	}
};
// Start game
resetGame();

===================================================================
--- original.js
+++ change.js
@@ -675,10 +675,13 @@
 					var b = balls[sb];
 					if (!b.slowed) {
 						b.slowed = true;
 						b.speed = 12;
-						b.vx *= 12 / Math.sqrt(b.vx * b.vx + b.vy * b.vy);
-						b.vy *= 12 / Math.sqrt(b.vx * b.vx + b.vy * b.vy);
+						var mag = Math.sqrt(b.vx * b.vx + b.vy * b.vy);
+						if (mag > 0) {
+							b.vx *= 12 / mag;
+							b.vy *= 12 / mag;
+						}
 					}
 				}
 				if (!game.slowTimeout) {
 					game.slowTimeout = LK.setTimeout(function () {
@@ -686,10 +689,13 @@
 							var b = balls[sb];
 							if (b.slowed) {
 								b.speed = 22;
 								b.slowed = false;
-								b.vx *= 22 / Math.sqrt(b.vx * b.vx + b.vy * b.vy);
-								b.vy *= 22 / Math.sqrt(b.vx * b.vx + b.vy * b.vy);
+								var mag = Math.sqrt(b.vx * b.vx + b.vy * b.vy);
+								if (mag > 0) {
+									b.vx *= 22 / mag;
+									b.vy *= 22 / mag;
+								}
 							}
 						}
 						game.slowTimeout = null;
 					}, 7000);
@@ -700,10 +706,13 @@
 					var b = balls[fb];
 					if (!b.fasted) {
 						b.fasted = true;
 						b.speed = 36;
-						b.vx *= 36 / Math.sqrt(b.vx * b.vx + b.vy * b.vy);
-						b.vy *= 36 / Math.sqrt(b.vx * b.vx + b.vy * b.vy);
+						var mag = Math.sqrt(b.vx * b.vx + b.vy * b.vy);
+						if (mag > 0) {
+							b.vx *= 36 / mag;
+							b.vy *= 36 / mag;
+						}
 					}
 				}
 				if (!game.fastTimeout) {
 					game.fastTimeout = LK.setTimeout(function () {
@@ -711,10 +720,13 @@
 							var b = balls[fb];
 							if (b.fasted) {
 								b.speed = 22;
 								b.fasted = false;
-								b.vx *= 22 / Math.sqrt(b.vx * b.vx + b.vy * b.vy);
-								b.vy *= 22 / Math.sqrt(b.vx * b.vx + b.vy * b.vy);
+								var mag = Math.sqrt(b.vx * b.vx + b.vy * b.vy);
+								if (mag > 0) {
+									b.vx *= 22 / mag;
+									b.vy *= 22 / mag;
+								}
 							}
 						}
 						game.fastTimeout = null;
 					}, 7000);