/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000
});

/**** 
* Game Code
****/ 
/** 
* Cat Defender - Idle Game
*
* A game where cats automatically defend against incoming birds and UFOs.
* Features idle point accumulation, upgrades, and progressive difficulty.
*/ 
// --- Global Variables ---
var cats = [];
var kittens = [];
var birds = [];
var ufos = [];
var powerUps = [];
var sparkles = [];
// Game State Variables
var score = 0;
var level = 1;
var multiplier = 1.0; // Starts at 1.0, increases by 0.1 per level
var idlePoints = 0;
var enemiesDefeated = 0;
var lastUpdateTime = Date.now();
var idlePointsLastCalculated = Date.now();
// Game Constants
var ENEMIES_PER_LEVEL = 11;
var BASE_IDLE_POINTS_RATE = 0.5; // Points per cat per second
var BIRD_POINTS = 10;
var UFO_POINTS = 20;
var BIRD_SPAWN_INTERVAL = 2000; // ms
var UFO_SPAWN_INTERVAL = 15000; // ms
var MAX_BIRDS = 10;
var MAX_UFOS = 3;
// Timers
var birdSpawnTimer = 0;
var ufoSpawnTimer = 0;
// --- Utility Functions ---
function distance(x1, y1, x2, y2) {
	var dx = x1 - x2;
	var dy = y1 - y2;
	return Math.sqrt(dx * dx + dy * dy);
}
// --- Game Classes ---
/** 
* Base class for game entities
*/ 
function GameObject(x, y, width, height, assetId) {
	this.x = x;
	this.y = y;
	this.width = width;
	this.height = height;
	this.assetId = assetId;
	this.active = true;
}
GameObject.prototype.update = function (deltaTime) {
	// Override in subclasses
};
GameObject.prototype.render = function () {
	if (!this.active) {
		return;
	}
	// Draw the sprite
	LK.drawImage(this.assetId, this.x, this.y, this.width, this.height);
};
GameObject.prototype.isColliding = function (other) {
	return this.x < other.x + other.width && this.x + this.width > other.x && this.y < other.y + other.height && this.y + this.height > other.y;
};
/** 
* Base class for defenders (Cats and Kittens)
*/ 
function Defender(x, y, width, height, assetId, attackRange, attackCooldown, attackDamage, moveSpeed) {
	GameObject.call(this, x, y, width, height, assetId);
	this.attackRange = attackRange;
	this.attackCooldown = attackCooldown;
	this.attackDamage = attackDamage;
	this.moveSpeed = moveSpeed;
	this.attackTimer = 0;
	this.target = null;
}
Defender.prototype = Object.create(GameObject.prototype);
Defender.prototype.constructor = Defender;
Defender.prototype.update = function (deltaTime) {
	if (!this.active) {
		return;
	}
	// Handle attack cooldown
	if (this.attackTimer > 0) {
		this.attackTimer -= deltaTime;
	}
	// Find target if none exists
	if (!this.target || !this.target.active) {
		this.findTarget();
	}
	// Move towards target or attack
	if (this.target) {
		var dist = distance(this.x + this.width / 2, this.y + this.height / 2, this.target.x + this.target.width / 2, this.target.y + this.target.height / 2);
		if (dist <= this.attackRange) {
			this.attack();
		} else {
			this.moveTowardsTarget(deltaTime);
		}
	}
};
Defender.prototype.findTarget = function () {
	// Find closest enemy
	var closestDist = Infinity;
	var closest = null;
	// Check birds first
	for (var i = 0; i < birds.length; i++) {
		var bird = birds[i];
		if (!bird.active) {
			continue;
		}
		var dist = distance(this.x + this.width / 2, this.y + this.height / 2, bird.x + bird.width / 2, bird.y + bird.height / 2);
		if (dist < closestDist) {
			closestDist = dist;
			closest = bird;
		}
	}
	// Check UFOs if no birds found or if this is a kitten (kittens prefer UFOs)
	if ((!closest || this instanceof Kitten) && ufos.length > 0) {
		for (var i = 0; i < ufos.length; i++) {
			var ufo = ufos[i];
			if (!ufo.active) {
				continue;
			}
			var dist = distance(this.x + this.width / 2, this.y + this.height / 2, ufo.x + ufo.width / 2, ufo.y + ufo.height / 2);
			if (dist < closestDist) {
				closestDist = dist;
				closest = ufo;
			}
		}
	}
	this.target = closest;
};
Defender.prototype.moveTowardsTarget = function (deltaTime) {
	if (!this.target) {
		return;
	}
	var targetX = this.target.x + this.target.width / 2;
	var targetY = this.target.y + this.target.height / 2;
	var dx = targetX - (this.x + this.width / 2);
	var dy = targetY - (this.y + this.height / 2);
	var dist = Math.sqrt(dx * dx + dy * dy);
	if (dist > 0) {
		var moveX = dx / dist * this.moveSpeed * deltaTime;
		var moveY = dy / dist * this.moveSpeed * deltaTime;
		this.x += moveX;
		this.y += moveY;
	}
};
Defender.prototype.attack = function () {
	if (this.attackTimer <= 0 && this.target && this.target.active) {
		this.target.takeDamage(this.attackDamage);
		this.attackTimer = this.attackCooldown;
		// Create attack effect
		createSparkle(this.target.x + this.target.width / 2, this.target.y + this.target.height / 2, 'attack');
	}
};
/** 
* Cat Class - Standard defender
*/ 
function Cat(x, y) {
	Defender.call(this, x, y, 64, 64, 'cat', 100, 1.0, 2, 2);
}
Cat.prototype = Object.create(Defender.prototype);
Cat.prototype.constructor = Cat;
/** 
* Kitten Class - Faster but weaker defender
*/ 
function Kitten(x, y) {
	Defender.call(this, x, y, 48, 48, 'kitten', 60, 0.5, 1, 3);
}
Kitten.prototype = Object.create(Defender.prototype);
Kitten.prototype.constructor = Kitten;
/** 
* Enemy base class
*/ 
function Enemy(x, y, width, height, assetId, health, speed, pointValue) {
	GameObject.call(this, x, y, width, height, assetId);
	this.health = health;
	this.maxHealth = health;
	this.speed = speed;
	this.pointValue = pointValue;
	this.targetX = LK.canvas.width / 2;
	this.targetY = LK.canvas.height / 2;
}
Enemy.prototype = Object.create(GameObject.prototype);
Enemy.prototype.constructor = Enemy;
Enemy.prototype.update = function (deltaTime) {
	if (!this.active) {
		return;
	}
	// Move towards center
	var dx = this.targetX - (this.x + this.width / 2);
	var dy = this.targetY - (this.y + this.height / 2);
	var dist = Math.sqrt(dx * dx + dy * dy);
	if (dist > 10) {
		// Not too close to center
		var moveX = dx / dist * this.speed * deltaTime;
		var moveY = dy / dist * this.speed * deltaTime;
		this.x += moveX;
		this.y += moveY;
	} else {
		// Reached center, remove
		this.active = false;
	}
};
Enemy.prototype.takeDamage = function (amount) {
	this.health -= amount;
	if (this.health <= 0) {
		this.defeat();
	}
};
Enemy.prototype.defeat = function () {
	this.active = false;
	// Add points
	var pointsEarned = this.pointValue * multiplier;
	score += pointsEarned;
	enemiesDefeated++;
	// Check for level up
	if (enemiesDefeated >= ENEMIES_PER_LEVEL) {
		levelUp();
	}
	// Create sparkles
	for (var i = 0; i < 5; i++) {
		createSparkle(this.x + Math.random() * this.width, this.y + Math.random() * this.height, 'defeat');
	}
	// Chance to spawn power-up
	if (Math.random() < 0.2) {
		// 20% chance
		spawnPowerUp(this.x, this.y);
	}
};
/** 
* Bird Class - Basic enemy
*/ 
function Bird(x, y) {
	Enemy.call(this, x, y, 32, 32, 'bird', 3, 30, BIRD_POINTS);
}
Bird.prototype = Object.create(Enemy.prototype);
Bird.prototype.constructor = Bird;
/** 
* UFO Class - Advanced enemy
*/ 
function UFO(x, y) {
	Enemy.call(this, x, y, 64, 32, 'ufo', 10, 15, UFO_POINTS);
}
UFO.prototype = Object.create(Enemy.prototype);
UFO.prototype.constructor = UFO;
/** 
* PowerUp Class
*/ 
function PowerUp(x, y, type) {
	GameObject.call(this, x, y, 32, 32, 'powerup_' + type);
	this.type = type;
	this.duration = 10; // seconds
	this.targetX = LK.canvas.width / 2;
	this.targetY = LK.canvas.height / 2;
}
PowerUp.prototype = Object.create(GameObject.prototype);
PowerUp.prototype.constructor = PowerUp;
PowerUp.prototype.update = function (deltaTime) {
	if (!this.active) {
		return;
	}
	// Move towards center
	var dx = this.targetX - (this.x + this.width / 2);
	var dy = this.targetY - (this.y + this.height / 2);
	var dist = Math.sqrt(dx * dx + dy * dy);
	if (dist > 10) {
		// Not too close to center
		var moveX = dx / dist * 50 * deltaTime;
		var moveY = dy / dist * 50 * deltaTime;
		this.x += moveX;
		this.y += moveY;
	} else {
		// Reached center, apply effect
		this.applyEffect();
		this.active = false;
	}
};
PowerUp.prototype.applyEffect = function () {
	switch (this.type) {
		case 'speed':
			// Increase all cats' speed by 50% for duration
			for (var i = 0; i < cats.length; i++) {
				cats[i].moveSpeed *= 1.5;
			}
			for (var i = 0; i < kittens.length; i++) {
				kittens[i].moveSpeed *= 1.5;
			}
			setTimeout(function () {
				for (var i = 0; i < cats.length; i++) {
					cats[i].moveSpeed /= 1.5;
				}
				for (var i = 0; i < kittens.length; i++) {
					kittens[i].moveSpeed /= 1.5;
				}
			}, this.duration * 1000);
			break;
		case 'damage':
			// Increase all cats' damage by 50% for duration
			for (var i = 0; i < cats.length; i++) {
				cats[i].attackDamage *= 1.5;
			}
			for (var i = 0; i < kittens.length; i++) {
				kittens[i].attackDamage *= 1.5;
			}
			setTimeout(function () {
				for (var i = 0; i < cats.length; i++) {
					cats[i].attackDamage /= 1.5;
				}
				for (var i = 0; i < kittens.length; i++) {
					kittens[i].attackDamage /= 1.5;
				}
			}, this.duration * 1000);
			break;
		case 'points':
			// Double points for duration
			var oldMultiplier = multiplier;
			multiplier *= 2;
			setTimeout(function () {
				multiplier = oldMultiplier;
			}, this.duration * 1000);
			break;
	}
	// Create effect
	for (var i = 0; i < 10; i++) {
		createSparkle(this.x + Math.random() * this.width, this.y + Math.random() * this.height, 'powerup');
	}
};
/** 
* Sparkle Class - Visual effects
*/ 
function Sparkle(x, y, type) {
	this.x = x;
	this.y = y;
	this.type = type;
	this.size = Math.random() * 5 + 5;
	this.lifespan = 0.5; // seconds
	this.maxLifespan = this.lifespan;
	this.active = true;
	// Set color based on type
	switch (type) {
		case 'attack':
			this.color = '#ffff00'; // Yellow
			break;
		case 'defeat':
			this.color = '#ff0000'; // Red
			break;
		case 'powerup':
			this.color = '#00ffff'; // Cyan
			break;
		case 'chain':
			this.color = '#ff00ff'; // Magenta
			break;
		default:
			this.color = '#ffffff';
		// White
	}
	// Random velocity
	var angle = Math.random() * Math.PI * 2;
	var speed = Math.random() * 100 + 50;
	this.vx = Math.cos(angle) * speed;
	this.vy = Math.sin(angle) * speed;
}
Sparkle.prototype.update = function (deltaTime) {
	if (!this.active) {
		return;
	}
	// Update position
	this.x += this.vx * deltaTime;
	this.y += this.vy * deltaTime;
	// Update lifespan
	this.lifespan -= deltaTime;
	if (this.lifespan <= 0) {
		this.active = false;
	}
};
Sparkle.prototype.render = function () {
	if (!this.active) {
		return;
	}
	// Calculate alpha based on remaining lifespan
	var alpha = this.lifespan / this.maxLifespan;
	// Draw sparkle
	LK.setFillStyle(this.color);
	LK.setGlobalAlpha(alpha);
	LK.fillCircle(this.x, this.y, this.size * alpha);
	LK.setGlobalAlpha(1.0);
};
// --- Game Functions ---
// Spawn a bird at a random edge position
function spawnBird() {
	if (birds.length >= MAX_BIRDS) {
		return;
	}
	var x, y;
	var side = Math.floor(Math.random() * 4);
	switch (side) {
		case 0:
			// Top
			x = Math.random() * LK.canvas.width;
			y = -32;
			break;
		case 1:
			// Right
			x = LK.canvas.width + 32;
			y = Math.random() * LK.canvas.height;
			break;
		case 2:
			// Bottom
			x = Math.random() * LK.canvas.width;
			y = LK.canvas.height + 32;
			break;
		case 3:
			// Left
			x = -32;
			y = Math.random() * LK.canvas.height;
			break;
	}
	var bird = new Bird(x, y);
	birds.push(bird);
	return bird;
}
// Spawn a UFO at a random edge position
function spawnUFO() {
	if (ufos.length >= MAX_UFOS) {
		return;
	}
	var x, y;
	var side = Math.floor(Math.random() * 4);
	switch (side) {
		case 0:
			// Top
			x = Math.random() * LK.canvas.width;
			y = -32;
			break;
		case 1:
			// Right
			x = LK.canvas.width + 64;
			y = Math.random() * LK.canvas.height;
			break;
		case 2:
			// Bottom
			x = Math.random() * LK.canvas.width;
			y = LK.canvas.height + 32;
			break;
		case 3:
			// Left
			x = -64;
			y = Math.random() * LK.canvas.height;
			break;
	}
	var ufo = new UFO(x, y);
	ufos.push(ufo);
	return ufo;
}
// Spawn a power-up
function spawnPowerUp(x, y, type) {
	// If type not specified, choose random
	if (!type) {
		var types = ['speed', 'damage', 'range', 'multi', 'chain', 'time'];
		type = types[Math.floor(Math.random() * types.length)];
	}
	var powerUp = new PowerUp(x, y, type);
	powerUps.push(powerUp);
	return powerUp;
}
// Level up function
function levelUp() {
	level++;
	multiplier = 1.0 + (level - 1) * 0.1;
	// Create level up effect
	var centerX = LK.canvas.width / 2;
	var centerY = LK.canvas.height / 2;
	// Create sparkles for level up effect
	for (var i = 0; i < 20; i++) {
		createSparkle(centerX + (Math.random() - 0.5) * 200, centerY + (Math.random() - 0.5) * 200, 'powerup');
	}
	// Reset enemy counter
	enemiesDefeated = 0;
	// Play level up sound
	LK.playSound('teslacoil');
}
// Calculate idle points
function calculateIdlePoints() {
	var currentTime = Date.now();
	var elapsedSeconds = (currentTime - idlePointsLastCalculated) / 1000;
	// Calculate points based on cats and kittens
	var pointsPerSecond = cats.length * BASE_IDLE_POINTS_RATE;
	pointsPerSecond += kittens.length * (BASE_IDLE_POINTS_RATE * 0.6); // Kittens generate 60% of cat rate
	// Apply level multiplier
	pointsPerSecond *= multiplier;
	// Add points
	var pointsEarned = pointsPerSecond * elapsedSeconds;
	idlePoints += pointsEarned;
	score += pointsEarned;
	// Update last calculation time
	idlePointsLastCalculated = currentTime;
	return pointsEarned;
}
// Update game state
function updateGame(deltaTime) {
	// Calculate idle points
	calculateIdlePoints();
	// Update all game objects
	// Update cats
	for (var i = cats.length - 1; i >= 0; i--) {
		var cat = cats[i];
		cat.update(deltaTime);
	}
	// Update kittens
	for (var i = kittens.length - 1; i >= 0; i--) {
		var kitten = kittens[i];
		kitten.update(deltaTime);
	}
	// Update birds and remove inactive ones
	for (var i = birds.length - 1; i >= 0; i--) {
		var bird = birds[i];
		bird.update(deltaTime);
		if (!bird.active) {
			birds.splice(i, 1);
		}
	}
	// Update UFOs and remove inactive ones
	for (var i = ufos.length - 1; i >= 0; i--) {
		var ufo = ufos[i];
		ufo.update(deltaTime);
		if (!ufo.active) {
			ufos.splice(i, 1);
		}
	}
	// Update power-ups and remove inactive ones
	for (var i = powerUps.length - 1; i >= 0; i--) {
		var powerUp = powerUps[i];
		powerUp.update(deltaTime);
		if (!powerUp.active) {
			powerUps.splice(i, 1);
		}
	}
	// Update sparkles and remove inactive ones
	for (var i = sparkles.length - 1; i >= 0; i--) {
		var sparkle = sparkles[i];
		sparkle.update(deltaTime);
		if (!sparkle.active) {
			sparkles.splice(i, 1);
		}
	}
	// Spawn birds
	birdSpawnTimer += deltaTime * 1000; // Convert to milliseconds
	if (birds.length < MAX_BIRDS && birdSpawnTimer >= BIRD_SPAWN_INTERVAL) {
		spawnBird();
		birdSpawnTimer = 0;
		LK.playSound('wings1', {
			volume: 0.2
		});
	}
	// Spawn UFOs
	ufoSpawnTimer += deltaTime * 1000; // Convert to milliseconds
	if (ufos.length < MAX_UFOS && ufoSpawnTimer >= UFO_SPAWN_INTERVAL && level >= 3) {
		spawnUFO();
		ufoSpawnTimer = 0;
		LK.playSound('ufo1');
	}
}
// Render game
function renderGame() {
	// Clear canvas
	LK.clear();
	// Draw background
	LK.setFillStyle('#1a1a2e');
	LK.fillRect(0, 0, LK.canvas.width, LK.canvas.height);
	// Render all game objects
	// Render sparkles first (background layer)
	for (var i = 0; i < sparkles.length; i++) {
		var sparkle = sparkles[i];
		sparkle.render();
	}
	// Render power-ups
	for (var i = 0; i < powerUps.length; i++) {
		var powerUp = powerUps[i];
		powerUp.render();
	}
	// Render birds
	for (var i = 0; i < birds.length; i++) {
		var bird = birds[i];
		bird.render();
	}
	// Render UFOs
	for (var i = 0; i < ufos.length; i++) {
		var ufo = ufos[i];
		ufo.render();
	}
	// Render cats
	for (var i = 0; i < cats.length; i++) {
		var cat = cats[i];
		cat.render();
	}
	// Render kittens
	for (var i = 0; i < kittens.length; i++) {
		var kitten = kittens[i];
		kitten.render();
	}
	// Render UI
	renderUI();
}
// Render UI elements
function renderUI() {
	// Score
	LK.setFillStyle('#FFFFFF');
	LK.setFont('24px Arial');
	LK.fillText("Score: ".concat(Math.floor(score)), LK.canvas.width / 2, 30, {
		align: 'center'
	});
	// Level
	LK.setFont('18px Arial');
	LK.fillText("Level: ".concat(level), LK.canvas.width - 20, 30, {
		align: 'right'
	});
	// Multiplier
	LK.fillText("Multiplier: x".concat(multiplier.toFixed(1)), LK.canvas.width - 20, 60, {
		align: 'right'
	});
	// Idle Points
	LK.fillText("Idle Points: ".concat(Math.floor(idlePoints)), LK.canvas.width - 20, LK.canvas.height - 20, {
		align: 'right'
	});
	// Enemies Defeated
	LK.fillText("Enemies: ".concat(enemiesDefeated, "/").concat(ENEMIES_PER_LEVEL), 20, 30, {
		align: 'left'
	});
	// Cat Count
	LK.fillText("Cats: ".concat(cats.length), 20, 60, {
		align: 'left'
	});
	// Kitten Count
	LK.fillText("Kittens: ".concat(kittens.length), 20, 90, {
		align: 'left'
	});
	// Spawn buttons
	renderButton("Add Cat (50)", 20, LK.canvas.height - 60, 120, 40, idlePoints >= 50);
	renderButton("Add Kitten (30)", 150, LK.canvas.height - 60, 120, 40, idlePoints >= 30);
}
// Render a button
function renderButton(text, x, y, width, height, enabled) {
	// Button background
	LK.setFillStyle(enabled ? '#33aa33' : '#666666');
	LK.fillRect(x, y, width, height);
	// Button border
	LK.setStrokeStyle('#FFFFFF');
	LK.strokeRect(x, y, width, height);
	// Button text
	LK.setFillStyle('#FFFFFF');
	LK.setFont('14px Arial');
	LK.fillText(text, x + width / 2, y + height / 2, {
		align: 'center',
		baseline: 'middle'
	});
}
// Handle mouse click
function handleMouseClick(x, y) {
	// Check if cat spawn button clicked
	if (x >= 20 && x <= 140 && y >= LK.canvas.height - 60 && y <= LK.canvas.height - 20) {
		if (idlePoints >= 50) {
			var cat = spawnCat(Math.random() * LK.canvas.width, Math.random() * LK.canvas.height);
			if (cat) {
				LK.playSound('chitter');
			}
		}
	}
	// Check if kitten spawn button clicked
	if (x >= 150 && x <= 270 && y >= LK.canvas.height - 60 && y <= LK.canvas.height - 20) {
		if (idlePoints >= 30) {
			var kitten = spawnKitten(Math.random() * LK.canvas.width, Math.random() * LK.canvas.height);
			if (kitten) {
				LK.playSound('chitter', {
					pitch: 1.5
				});
			}
		}
	}
}
// Initialize game
function initGame() {
	// Reset game state
	cats = [];
	kittens = [];
	birds = [];
	ufos = [];
	powerUps = [];
	sparkles = [];
	score = 0;
	level = 1;
	multiplier = 1.0;
	idlePoints = 100; // Start with enough for 2 cats or 3 kittens
	enemiesDefeated = 0;
	lastUpdateTime = Date.now();
	idlePointsLastCalculated = Date.now();
	birdSpawnTimer = 0;
	ufoSpawnTimer = 0;
	// Create initial cats
	spawnCat(LK.canvas.width / 2, LK.canvas.height / 2);
	// Setup mouse click handler
	LK.onMouseDown = function (event) {
		handleMouseClick(event.x, event.y);
	};
	// Play background music
	LK.playMusic('bgm1', {
		volume: 0.3,
		loop: true
	});
	// Occasionally play ambient sounds
	setInterval(function () {
		if (Math.random() < 0.3) {
			var sounds = ['breeze1', 'cricket1', 'frog1', 'songbird1'];
			var sound = sounds[Math.floor(Math.random() * sounds.length)];
			LK.playSound(sound, {
				volume: 0.1 + Math.random() * 0.1
			});
		}
	}, 10000);
	// Start game loop
	startGameLoop();
}
// Game loop
var lastFrameTime = 0;
function gameLoop(timestamp) {
	// Calculate delta time
	var deltaTime = (timestamp - lastFrameTime) / 1000; // Convert to seconds
	lastFrameTime = timestamp;
	// Cap delta time to prevent large jumps
	if (deltaTime > 0.1) {
		deltaTime = 0.1;
	}
	// Update game state
	updateGame(deltaTime);
	// Render game
	renderGame();
	// Request next frame
	requestAnimationFrame(gameLoop);
}
// Start game loop
function startGameLoop() {
	lastFrameTime = performance.now();
	requestAnimationFrame(gameLoop);
}
// Initialize game when page loads
window.onload = function () {
	initGame();
};

===================================================================
--- original.js
+++ change.js
@@ -7,9 +7,8 @@
 
 /**** 
 * Game Code
 ****/ 
-// Initialize shape assets for game objects
 /** 
 * Cat Defender - Idle Game
 *
 * A game where cats automatically defend against incoming birds and UFOs.
@@ -555,45 +554,8 @@
 		if (!sparkle.active) {
 			sparkles.splice(i, 1);
 		}
 	}
-	// Update kittens
-	for (var i = kittens.length - 1; i >= 0; i--) {
-		var kitten = kittens[i];
-		kitten.update(deltaTime);
-	}
-	// Update birds and remove inactive ones
-	for (var i = birds.length - 1; i >= 0; i--) {
-		var bird = birds[i];
-		bird.update(deltaTime);
-		if (!bird.active) {
-			birds.splice(i, 1);
-		}
-	}
-	// Update UFOs and remove inactive ones
-	for (var i = ufos.length - 1; i >= 0; i--) {
-		var ufo = ufos[i];
-		ufo.update(deltaTime);
-		if (!ufo.active) {
-			ufos.splice(i, 1);
-		}
-	}
-	// Update power-ups and remove inactive ones
-	for (var i = powerUps.length - 1; i >= 0; i--) {
-		var powerUp = powerUps[i];
-		powerUp.update(deltaTime);
-		if (!powerUp.active) {
-			powerUps.splice(i, 1);
-		}
-	}
-	// Update sparkles and remove inactive ones
-	for (var i = sparkles.length - 1; i >= 0; i--) {
-		var sparkle = sparkles[i];
-		sparkle.update(deltaTime);
-		if (!sparkle.active) {
-			sparkles.splice(i, 1);
-		}
-	}
 	// Spawn birds
 	birdSpawnTimer += deltaTime * 1000; // Convert to milliseconds
 	if (birds.length < MAX_BIRDS && birdSpawnTimer >= BIRD_SPAWN_INTERVAL) {
 		spawnBird();
@@ -647,33 +609,8 @@
 	for (var i = 0; i < kittens.length; i++) {
 		var kitten = kittens[i];
 		kitten.render();
 	}
-	// Render power-ups
-	for (var i = 0; i < powerUps.length; i++) {
-		var powerUp = powerUps[i];
-		powerUp.render();
-	}
-	// Render birds
-	for (var i = 0; i < birds.length; i++) {
-		var bird = birds[i];
-		bird.render();
-	}
-	// Render UFOs
-	for (var i = 0; i < ufos.length; i++) {
-		var ufo = ufos[i];
-		ufo.render();
-	}
-	// Render cats
-	for (var i = 0; i < cats.length; i++) {
-		var cat = cats[i];
-		cat.render();
-	}
-	// Render kittens
-	for (var i = 0; i < kittens.length; i++) {
-		var kitten = kittens[i];
-		kitten.render();
-	}
 	// Render UI
 	renderUI();
 }
 // Render UI elements
@@ -771,16 +708,8 @@
 	birdSpawnTimer = 0;
 	ufoSpawnTimer = 0;
 	// Create initial cats
 	spawnCat(LK.canvas.width / 2, LK.canvas.height / 2);
-	// Create initial kittens
-	spawnKitten(LK.canvas.width / 2 + 100, LK.canvas.height / 2 + 100);
-	// Create initial birds
-	spawnBird();
-	// Create initial UFOs
-	spawnUFO();
-	// Create initial power-ups
-	spawnPowerUp(LK.canvas.width / 2, LK.canvas.height / 2, 'speed');
 	// Setup mouse click handler
 	LK.onMouseDown = function (event) {
 		handleMouseClick(event.x, event.y);
 	};