===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,413 @@
-/****
+/**** 
+* 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.velocityX = 0;
+	self.velocityY = 0;
+	self.lifeTime = 0;
+	self.maxLifeTime = 60; // 1 second at 60fps
+	self.update = function () {
+		self.x += self.velocityX;
+		self.y += self.velocityY;
+		self.lifeTime++;
+	};
+	return self;
+});
+var FastZombie = Container.expand(function () {
+	var self = Container.call(this);
+	var zombieGraphics = self.attachAsset('fastZombie', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.health = 1;
+	self.maxHealth = 1;
+	self.speed = 3;
+	self.points = 15;
+	self.lastX = 0;
+	self.lastY = 0;
+	self.update = function () {
+		if (player) {
+			self.lastX = self.x;
+			self.lastY = self.y;
+			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 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.ammunition = 30;
+	self.maxAmmo = 30;
+	self.reloadTime = 0;
+	self.shootCooldown = 0;
+	return self;
+});
+var TankZombie = Container.expand(function () {
+	var self = Container.call(this);
+	var zombieGraphics = self.attachAsset('tankZombie', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.health = 3;
+	self.maxHealth = 3;
+	self.speed = 1;
+	self.points = 25;
+	self.lastX = 0;
+	self.lastY = 0;
+	self.update = function () {
+		if (player) {
+			self.lastX = self.x;
+			self.lastY = self.y;
+			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 Zombie = Container.expand(function () {
+	var self = Container.call(this);
+	var zombieGraphics = self.attachAsset('zombie', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.health = 1;
+	self.maxHealth = 1;
+	self.speed = 1.5;
+	self.points = 10;
+	self.lastX = 0;
+	self.lastY = 0;
+	self.update = function () {
+		if (player) {
+			self.lastX = self.x;
+			self.lastY = self.y;
+			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;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x2F4F2F
+});
+
+/**** 
+* Game Code
+****/ 
+// Game variables
+var player;
+var bullets = [];
+var zombies = [];
+var currentWave = 1;
+var zombiesSpawned = 0;
+var zombiesKilled = 0;
+var gameTime = 0;
+var waveTime = 0;
+var spawnTimer = 0;
+var dragNode = null;
+var killStreak = 0;
+var killStreakTimer = 0;
+// Wave configuration
+var waveConfigs = [{
+	zombieCount: 8,
+	spawnDelay: 90,
+	zombieTypes: ['zombie']
+}, {
+	zombieCount: 12,
+	spawnDelay: 75,
+	zombieTypes: ['zombie', 'fastZombie']
+}, {
+	zombieCount: 16,
+	spawnDelay: 60,
+	zombieTypes: ['zombie', 'fastZombie']
+}, {
+	zombieCount: 20,
+	spawnDelay: 50,
+	zombieTypes: ['zombie', 'fastZombie', 'tankZombie']
+}, {
+	zombieCount: 25,
+	spawnDelay: 45,
+	zombieTypes: ['zombie', 'fastZombie', 'tankZombie']
+}, {
+	zombieCount: 30,
+	spawnDelay: 40,
+	zombieTypes: ['zombie', 'fastZombie', 'tankZombie']
+}, {
+	zombieCount: 35,
+	spawnDelay: 35,
+	zombieTypes: ['zombie', 'fastZombie', 'tankZombie']
+}, {
+	zombieCount: 40,
+	spawnDelay: 30,
+	zombieTypes: ['zombie', 'fastZombie', 'tankZombie']
+}];
+// UI Elements
+var scoreText = new Text2('Score: 0', {
+	size: 60,
+	fill: 0xFFFFFF
+});
+scoreText.anchor.set(0, 0);
+scoreText.x = 120;
+scoreText.y = 20;
+LK.gui.topLeft.addChild(scoreText);
+var waveText = new Text2('Wave: 1', {
+	size: 60,
+	fill: 0xFFFFFF
+});
+waveText.anchor.set(0.5, 0);
+LK.gui.top.addChild(waveText);
+var timerText = new Text2('Time: 90', {
+	size: 60,
+	fill: 0xFFFFFF
+});
+timerText.anchor.set(1, 0);
+timerText.x = -20;
+timerText.y = 20;
+LK.gui.topRight.addChild(timerText);
+var ammoText = new Text2('Ammo: 30/30', {
+	size: 50,
+	fill: 0xFFFFFF
+});
+ammoText.anchor.set(0.5, 1);
+ammoText.y = -20;
+LK.gui.bottom.addChild(ammoText);
+var healthText = new Text2('Health: 100', {
+	size: 50,
+	fill: 0xFFFFFF
+});
+healthText.anchor.set(0, 1);
+healthText.x = 20;
+healthText.y = -20;
+LK.gui.bottomLeft.addChild(healthText);
+// Initialize player
+player = game.addChild(new Player());
+player.x = 1024;
+player.y = 1366;
+// Spawn zombie function
+function spawnZombie() {
+	var config = waveConfigs[Math.min(currentWave - 1, waveConfigs.length - 1)];
+	var zombieTypes = config.zombieTypes;
+	var randomType = zombieTypes[Math.floor(Math.random() * zombieTypes.length)];
+	var zombie;
+	if (randomType === 'fastZombie') {
+		zombie = new FastZombie();
+	} else if (randomType === 'tankZombie') {
+		zombie = new TankZombie();
+	} else {
+		zombie = new Zombie();
+	}
+	// Spawn from random edge
+	var edge = Math.floor(Math.random() * 4);
+	if (edge === 0) {
+		// Top
+		zombie.x = Math.random() * 2048;
+		zombie.y = -30;
+	} else if (edge === 1) {
+		// Right
+		zombie.x = 2078;
+		zombie.y = Math.random() * 2732;
+	} else if (edge === 2) {
+		// Bottom
+		zombie.x = Math.random() * 2048;
+		zombie.y = 2762;
+	} else {
+		// Left
+		zombie.x = -30;
+		zombie.y = Math.random() * 2732;
+	}
+	zombie.lastX = zombie.x;
+	zombie.lastY = zombie.y;
+	zombies.push(zombie);
+	game.addChild(zombie);
+	zombiesSpawned++;
+}
+// Shoot function
+function shootBullet(targetX, targetY) {
+	if (player.ammunition <= 0 || player.shootCooldown > 0 || player.reloadTime > 0) {
+		return;
+	}
+	var bullet = new Bullet();
+	bullet.x = player.x;
+	bullet.y = player.y;
+	var dx = targetX - player.x;
+	var dy = targetY - player.y;
+	var distance = Math.sqrt(dx * dx + dy * dy);
+	if (distance > 0) {
+		bullet.velocityX = dx / distance * bullet.speed;
+		bullet.velocityY = dy / distance * bullet.speed;
+	}
+	bullets.push(bullet);
+	game.addChild(bullet);
+	player.ammunition--;
+	player.shootCooldown = 10; // 10 frames cooldown
+	LK.getSound('shoot').play();
+	updateUI();
+}
+// Update UI function
+function updateUI() {
+	scoreText.setText('Score: ' + LK.getScore());
+	waveText.setText('Wave: ' + currentWave);
+	timerText.setText('Time: ' + Math.max(0, Math.ceil((90 * 60 - gameTime) / 60)));
+	ammoText.setText('Ammo: ' + player.ammunition + '/' + player.maxAmmo);
+	healthText.setText('Health: ' + player.health);
+}
+// Handle move events
+function handleMove(x, y, obj) {
+	if (dragNode) {
+		// Keep player within bounds
+		dragNode.x = Math.max(40, Math.min(2008, x));
+		dragNode.y = Math.max(40, Math.min(2692, y));
+	}
+}
+// Game event handlers
+game.move = handleMove;
+game.down = function (x, y, obj) {
+	dragNode = player;
+	handleMove(x, y, obj);
+	// Also shoot at touch position
+	shootBullet(x, y);
+};
+game.up = function (x, y, obj) {
+	dragNode = null;
+	// Shoot when releasing
+	shootBullet(x, y);
+};
+// Main game update loop
+game.update = function () {
+	gameTime++;
+	waveTime++;
+	// Update cooldowns
+	if (player.shootCooldown > 0) {
+		player.shootCooldown--;
+	}
+	// Handle reloading
+	if (player.ammunition <= 0 && player.reloadTime <= 0) {
+		player.reloadTime = 120; // 2 seconds reload
+	}
+	if (player.reloadTime > 0) {
+		player.reloadTime--;
+		if (player.reloadTime === 0) {
+			player.ammunition = player.maxAmmo;
+		}
+	}
+	// Update kill streak timer
+	if (killStreakTimer > 0) {
+		killStreakTimer--;
+		if (killStreakTimer <= 0) {
+			killStreak = 0;
+		}
+	}
+	// Wave management
+	var config = waveConfigs[Math.min(currentWave - 1, waveConfigs.length - 1)];
+	// Spawn zombies
+	if (zombiesSpawned < config.zombieCount) {
+		spawnTimer++;
+		if (spawnTimer >= config.spawnDelay) {
+			spawnZombie();
+			spawnTimer = 0;
+		}
+	}
+	// Check wave completion
+	if (zombiesSpawned >= config.zombieCount && zombies.length === 0) {
+		currentWave++;
+		zombiesSpawned = 0;
+		waveTime = 0;
+		// Bonus points for wave completion
+		LK.setScore(LK.getScore() + currentWave * 50);
+		LK.getSound('waveStart').play();
+		// Restore some ammo and health
+		player.ammunition = Math.min(player.maxAmmo, player.ammunition + 10);
+		player.health = Math.min(player.maxHealth, player.health + 10);
+	}
+	// Update bullets
+	for (var i = bullets.length - 1; i >= 0; i--) {
+		var bullet = bullets[i];
+		// Remove bullets that are too old or off-screen
+		if (bullet.lifeTime >= bullet.maxLifeTime || bullet.x < -50 || bullet.x > 2098 || bullet.y < -50 || bullet.y > 2782) {
+			bullet.destroy();
+			bullets.splice(i, 1);
+			continue;
+		}
+		// Check bullet-zombie collisions
+		for (var j = zombies.length - 1; j >= 0; j--) {
+			var zombie = zombies[j];
+			if (bullet.intersects(zombie)) {
+				zombie.health--;
+				// Flash zombie when hit
+				LK.effects.flashObject(zombie, 0xff0000, 200);
+				LK.getSound('zombieHit').play();
+				bullet.destroy();
+				bullets.splice(i, 1);
+				if (zombie.health <= 0) {
+					// Add score with kill streak multiplier
+					var points = zombie.points * (1 + killStreak * 0.1);
+					LK.setScore(LK.getScore() + Math.floor(points));
+					killStreak++;
+					killStreakTimer = 180; // 3 seconds
+					zombie.destroy();
+					zombies.splice(j, 1);
+					zombiesKilled++;
+				}
+				break;
+			}
+		}
+	}
+	// Update zombies and check player collision
+	for (var k = zombies.length - 1; k >= 0; k--) {
+		var zombie = zombies[k];
+		// Check zombie-player collision
+		if (zombie.intersects(player)) {
+			player.health -= 10;
+			LK.effects.flashScreen(0xff0000, 500);
+			zombie.destroy();
+			zombies.splice(k, 1);
+			if (player.health <= 0) {
+				LK.showGameOver();
+				return;
+			}
+		}
+	}
+	// Check win condition (90 seconds = 5400 frames at 60fps)
+	if (gameTime >= 5400) {
+		LK.showYouWin();
+		return;
+	}
+	// Update UI
+	updateUI();
+};
\ No newline at end of file