===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,456 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+var Bullet = Container.expand(function () {
+	var self = Container.call(this);
+	var bulletGraphics = self.attachAsset('bullet', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 15;
+	self.damage = 25;
+	self.targetX = 0;
+	self.targetY = 0;
+	self.directionX = 0;
+	self.directionY = 0;
+	self.setTarget = function (targetX, targetY) {
+		var dx = targetX - self.x;
+		var dy = targetY - self.y;
+		var distance = Math.sqrt(dx * dx + dy * dy);
+		if (distance > 0) {
+			self.directionX = dx / distance;
+			self.directionY = dy / distance;
+		}
+	};
+	self.update = function () {
+		self.x += self.directionX * self.speed;
+		self.y += self.directionY * self.speed;
+	};
+	return self;
+});
+var Player = Container.expand(function () {
+	var self = Container.call(this);
+	var playerGraphics = self.attachAsset('player', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.health = 100;
+	self.maxHealth = 100;
+	self.ammo = 50;
+	self.maxAmmo = 100;
+	self.shootCooldown = 0;
+	self.shootRate = 15; // shoots every 15 ticks
+	self.rapidFireBonus = 0;
+	self.takeDamage = function (damage) {
+		self.health -= damage;
+		if (self.health <= 0) {
+			self.health = 0;
+			return true; // player died
+		}
+		return false;
+	};
+	self.addHealth = function (amount) {
+		self.health = Math.min(self.health + amount, self.maxHealth);
+	};
+	self.addAmmo = function (amount) {
+		self.ammo = Math.min(self.ammo + amount, self.maxAmmo);
+	};
+	self.update = function () {
+		if (self.shootCooldown > 0) {
+			self.shootCooldown--;
+		}
+		if (self.rapidFireBonus > 0) {
+			self.rapidFireBonus--;
+		}
+	};
+	return self;
+});
+var PowerUp = Container.expand(function () {
+	var self = Container.call(this);
+	self.type = 'health';
+	self.lifetime = 600; // 10 seconds at 60fps
+	self.update = function () {
+		self.lifetime--;
+		if (self.lifetime <= 0) {
+			return true; // should be removed
+		}
+		return false;
+	};
+	return self;
+});
+var RapidFire = PowerUp.expand(function () {
+	var self = PowerUp.call(this);
+	var packGraphics = self.attachAsset('rapidFire', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.type = 'rapidfire';
+	self.value = 300; // 5 seconds of rapid fire
+	return self;
+});
+var HealthPack = PowerUp.expand(function () {
+	var self = PowerUp.call(this);
+	var packGraphics = self.attachAsset('healthPack', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.type = 'health';
+	self.value = 30;
+	return self;
+});
+var AmmoPack = PowerUp.expand(function () {
+	var self = PowerUp.call(this);
+	var packGraphics = self.attachAsset('ammoPack', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.type = 'ammo';
+	self.value = 25;
+	return self;
+});
+var Zombie = Container.expand(function () {
+	var self = Container.call(this);
+	self.health = 50;
+	self.maxHealth = 50;
+	self.speed = 2;
+	self.damage = 20;
+	self.scoreValue = 10;
+	self.type = 'walker';
+	self.takeDamage = function (damage) {
+		self.health -= damage;
+		return self.health <= 0;
+	};
+	self.update = function () {
+		// Move toward player
+		var dx = player.x - self.x;
+		var dy = player.y - self.y;
+		var distance = Math.sqrt(dx * dx + dy * dy);
+		if (distance > 0) {
+			self.x += dx / distance * self.speed;
+			self.y += dy / distance * self.speed;
+		}
+	};
+	return self;
+});
+var ZombieWalker = Zombie.expand(function () {
+	var self = Zombie.call(this);
+	var zombieGraphics = self.attachAsset('zombieWalker', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.health = 50;
+	self.maxHealth = 50;
+	self.speed = 2;
+	self.damage = 20;
+	self.scoreValue = 10;
+	self.type = 'walker';
+	return self;
+});
+var ZombieRunner = Zombie.expand(function () {
+	var self = Zombie.call(this);
+	var zombieGraphics = self.attachAsset('zombieRunner', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.health = 30;
+	self.maxHealth = 30;
+	self.speed = 4;
+	self.damage = 15;
+	self.scoreValue = 15;
+	self.type = 'runner';
+	return self;
+});
+var ZombieBrute = Zombie.expand(function () {
+	var self = Zombie.call(this);
+	var zombieGraphics = self.attachAsset('zombieBrute', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.health = 100;
+	self.maxHealth = 100;
+	self.speed = 1;
+	self.damage = 35;
+	self.scoreValue = 25;
+	self.type = 'brute';
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x2d2d2d
+});
+
+/**** 
+* Game Code
+****/ 
+// Game variables
+var player;
+var bullets = [];
+var zombies = [];
+var powerUps = [];
+var waveNumber = 1;
+var zombiesKilled = 0;
+var gameTime = 0;
+var spawnTimer = 0;
+var powerUpTimer = 0;
+var dragNode = null;
+// UI Elements
+var scoreText = new Text2('Score: 0', {
+	size: 40,
+	fill: 0xFFFFFF
+});
+scoreText.anchor.set(0, 0);
+scoreText.x = 120;
+scoreText.y = 20;
+LK.gui.topLeft.addChild(scoreText);
+var healthText = new Text2('Health: 100', {
+	size: 40,
+	fill: 0xFF0000
+});
+healthText.anchor.set(0.5, 0);
+LK.gui.top.addChild(healthText);
+var ammoText = new Text2('Ammo: 50', {
+	size: 40,
+	fill: 0xFFFF00
+});
+ammoText.anchor.set(1, 0);
+ammoText.x = -20;
+ammoText.y = 20;
+LK.gui.topRight.addChild(ammoText);
+var waveText = new Text2('Wave: 1', {
+	size: 40,
+	fill: 0x00FF00
+});
+waveText.anchor.set(0.5, 0);
+waveText.y = 80;
+LK.gui.top.addChild(waveText);
+// Initialize player
+player = game.addChild(new Player());
+player.x = 1024;
+player.y = 1366;
+// Helper functions
+function updateUI() {
+	scoreText.setText('Score: ' + LK.getScore());
+	healthText.setText('Health: ' + player.health);
+	ammoText.setText('Ammo: ' + player.ammo);
+	waveText.setText('Wave: ' + waveNumber);
+}
+function getRandomSpawnPosition() {
+	var side = Math.floor(Math.random() * 4);
+	var x, y;
+	switch (side) {
+		case 0:
+			// top
+			x = Math.random() * 2048;
+			y = -50;
+			break;
+		case 1:
+			// right
+			x = 2098;
+			y = Math.random() * 2732;
+			break;
+		case 2:
+			// bottom
+			x = Math.random() * 2048;
+			y = 2782;
+			break;
+		case 3:
+			// left
+			x = -50;
+			y = Math.random() * 2732;
+			break;
+	}
+	return {
+		x: x,
+		y: y
+	};
+}
+function spawnZombie() {
+	var pos = getRandomSpawnPosition();
+	var zombie;
+	var rand = Math.random();
+	if (rand < 0.6) {
+		zombie = new ZombieWalker();
+	} else if (rand < 0.85) {
+		zombie = new ZombieRunner();
+	} else {
+		zombie = new ZombieBrute();
+	}
+	zombie.x = pos.x;
+	zombie.y = pos.y;
+	zombies.push(zombie);
+	game.addChild(zombie);
+}
+function spawnPowerUp() {
+	var x = Math.random() * 1800 + 124; // Keep away from edges
+	var y = Math.random() * 2400 + 166;
+	var powerUp;
+	var rand = Math.random();
+	if (rand < 0.4) {
+		powerUp = new HealthPack();
+	} else if (rand < 0.7) {
+		powerUp = new AmmoPack();
+	} else {
+		powerUp = new RapidFire();
+	}
+	powerUp.x = x;
+	powerUp.y = y;
+	powerUps.push(powerUp);
+	game.addChild(powerUp);
+}
+function findNearestZombie() {
+	var nearestZombie = null;
+	var minDistance = Infinity;
+	for (var i = 0; i < zombies.length; i++) {
+		var zombie = zombies[i];
+		var dx = zombie.x - player.x;
+		var dy = zombie.y - player.y;
+		var distance = Math.sqrt(dx * dx + dy * dy);
+		if (distance < minDistance) {
+			minDistance = distance;
+			nearestZombie = zombie;
+		}
+	}
+	return nearestZombie;
+}
+function shootAtZombie() {
+	if (player.ammo <= 0 || player.shootCooldown > 0) {
+		return;
+	}
+	var target = findNearestZombie();
+	if (!target) {
+		return;
+	}
+	var bullet = new Bullet();
+	bullet.x = player.x;
+	bullet.y = player.y;
+	bullet.setTarget(target.x, target.y);
+	bullets.push(bullet);
+	game.addChild(bullet);
+	player.ammo--;
+	player.shootCooldown = player.rapidFireBonus > 0 ? 5 : player.shootRate;
+	LK.getSound('shoot').play();
+}
+// Event handlers
+game.down = function (x, y, obj) {
+	dragNode = player;
+	player.x = x;
+	player.y = y;
+};
+game.move = function (x, y, obj) {
+	if (dragNode) {
+		dragNode.x = x;
+		dragNode.y = y;
+	}
+};
+game.up = function (x, y, obj) {
+	dragNode = null;
+};
+// Main game loop
+game.update = function () {
+	gameTime++;
+	// Update spawn rate based on wave
+	var baseSpawnRate = Math.max(120 - waveNumber * 10, 30);
+	if (gameTime % baseSpawnRate === 0) {
+		spawnZombie();
+	}
+	// Spawn power-ups occasionally
+	powerUpTimer++;
+	if (powerUpTimer >= 1800) {
+		// Every 30 seconds
+		spawnPowerUp();
+		powerUpTimer = 0;
+	}
+	// Try to shoot
+	shootAtZombie();
+	// Update bullets
+	for (var i = bullets.length - 1; i >= 0; i--) {
+		var bullet = bullets[i];
+		// Check if bullet is off screen
+		if (bullet.x < -50 || bullet.x > 2098 || bullet.y < -50 || bullet.y > 2782) {
+			bullet.destroy();
+			bullets.splice(i, 1);
+			continue;
+		}
+		// Check bullet-zombie collisions
+		var hitZombie = false;
+		for (var j = zombies.length - 1; j >= 0; j--) {
+			var zombie = zombies[j];
+			if (bullet.intersects(zombie)) {
+				if (zombie.takeDamage(bullet.damage)) {
+					// Zombie is dead
+					LK.setScore(LK.getScore() + zombie.scoreValue);
+					zombiesKilled++;
+					zombie.destroy();
+					zombies.splice(j, 1);
+					LK.getSound('zombieHit').play();
+					// Check for wave progression
+					if (zombiesKilled >= waveNumber * 10) {
+						waveNumber++;
+						zombiesKilled = 0;
+					}
+				}
+				bullet.destroy();
+				bullets.splice(i, 1);
+				hitZombie = true;
+				break;
+			}
+		}
+		if (hitZombie) continue;
+	}
+	// Update zombies and check player collision
+	for (var i = zombies.length - 1; i >= 0; i--) {
+		var zombie = zombies[i];
+		if (zombie.intersects(player)) {
+			if (player.takeDamage(zombie.damage)) {
+				// Player died
+				LK.showGameOver();
+				return;
+			}
+			LK.getSound('damage').play();
+			LK.effects.flashScreen(0xff0000, 500);
+			zombie.destroy();
+			zombies.splice(i, 1);
+		}
+	}
+	// Update power-ups and check collection
+	for (var i = powerUps.length - 1; i >= 0; i--) {
+		var powerUp = powerUps[i];
+		if (powerUp.update()) {
+			// Power-up expired
+			powerUp.destroy();
+			powerUps.splice(i, 1);
+			continue;
+		}
+		if (powerUp.intersects(player)) {
+			LK.getSound('powerup').play();
+			switch (powerUp.type) {
+				case 'health':
+					player.addHealth(powerUp.value);
+					break;
+				case 'ammo':
+					player.addAmmo(powerUp.value);
+					break;
+				case 'rapidfire':
+					player.rapidFireBonus = powerUp.value;
+					break;
+			}
+			powerUp.destroy();
+			powerUps.splice(i, 1);
+		}
+	}
+	// Update UI
+	updateUI();
+	// Check win condition (survive for 10 minutes)
+	if (gameTime >= 36000) {
+		// 10 minutes at 60fps
+		LK.showYouWin();
+	}
+};
\ No newline at end of file