/**** 
* Classes
****/ 
var Bullet = Container.expand(function (startX, startY, targetX, targetY) {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.x = startX;
	self.y = startY;
	var speed = 10;
	var angle = Math.atan2(targetY - startY, targetX - startX);
	self.vx = Math.cos(angle) * speed;
	self.vy = Math.sin(angle) * speed;
	self.update = function () {
		self.x += self.vx;
		self.y += self.vy;
		if (self.x < 0 || self.x > 2048 || self.y < 0 || self.y > 2732) {
			self.destroy();
		}
	};
});
//<Write imports for supported plugins here>
//<Write entity 'classes' with empty functions for important behavior here>
var Turret = Container.expand(function () {
	var self = Container.call(this);
	var turretGraphics = self.attachAsset('turret', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.shoot = function (targetX, targetY) {
		var bullet = new Bullet(self.x, self.y, targetX, targetY);
		game.addChild(bullet);
		bullets.push(bullet);
	};
});
var Zombie = Container.expand(function () {
	var self = Container.call(this);
	var zombieGraphics = self.attachAsset('zombie', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.spawnZombie();
	var speed = 2;
	self.update = function () {
		var angle = Math.atan2(turret.y - self.y, turret.x - self.x);
		self.x += Math.cos(angle) * speed;
		self.y += Math.sin(angle) * speed;
		if (self.intersects(turret)) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		}
	};
});
var Zombie2 = Container.expand(function () {
	var self = Container.call(this);
	var zombieGraphics = self.attachAsset('zombie2', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.spawnZombie();
	var speed = 2;
	self.update = function () {
		var angle = Math.atan2(turret.y - self.y, turret.x - self.x);
		self.x += Math.cos(angle) * speed;
		self.y += Math.sin(angle) * speed;
		if (self.intersects(turret)) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		}
	};
});

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

/**** 
* Game Code
****/ 
//<Assets used in the game will automatically appear here>
//<Write game logic code here, including initializing arrays and variables>
Zombie.prototype.spawnZombie = Zombie2.prototype.spawnZombie = function () {
	var side = Math.floor(Math.random() * 4);
	switch (side) {
		case 0:
			// top
			this.x = Math.random() * 2048;
			this.y = -181.78;
			break;
		case 1:
			// right
			this.x = 2048 + 120;
			this.y = Math.random() * 2732;
			break;
		case 2:
			// bottom
			this.x = Math.random() * 2048;
			this.y = 2732 + 181.78;
			break;
		case 3:
			// left
			this.x = -120;
			this.y = Math.random() * 2732;
			break;
	}
};
var turret = game.addChild(new Turret());
turret.x = 2048 / 2;
turret.y = 2732 / 2;
var bullets = [];
var zombies = [];
game.down = function (x, y, obj) {
	turret.shoot(x, y);
};
game.update = function () {
	for (var i = bullets.length - 1; i >= 0; i--) {
		bullets[i].update();
		for (var j = zombies.length - 1; j >= 0; j--) {
			if (bullets[i].intersects(zombies[j])) {
				bullets[i].destroy();
				bullets.splice(i, 1);
				if (zombies[j] instanceof Zombie2) {
					var newZombie1 = new Zombie();
					newZombie1.x = zombies[j].x;
					newZombie1.y = zombies[j].y;
					game.addChild(newZombie1);
					zombies.push(newZombie1);
					var newZombie2 = new Zombie();
					newZombie2.x = zombies[j].x + 20; // Spawn the second zombie slightly to the right
					newZombie2.y = zombies[j].y;
					game.addChild(newZombie2);
					zombies.push(newZombie2);
				}
				zombies[j].destroy();
				zombies.splice(j, 1);
				break;
			}
		}
	}
	for (var k = zombies.length - 1; k >= 0; k--) {
		zombies[k].update();
	}
	if (LK.ticks % 60 == 0) {
		var newZombie = new Zombie();
		game.addChild(newZombie);
		zombies.push(newZombie);
	}
	if (LK.ticks % 360 == 0) {
		var newZombie2 = new Zombie2();
		game.addChild(newZombie2);
		zombies.push(newZombie2);
	}
};

===================================================================
--- original.js
+++ change.js
@@ -130,9 +130,9 @@
 					newZombie1.y = zombies[j].y;
 					game.addChild(newZombie1);
 					zombies.push(newZombie1);
 					var newZombie2 = new Zombie();
-					newZombie2.x = zombies[j].x + 10; // Spawn the second zombie slightly to the right
+					newZombie2.x = zombies[j].x + 20; // Spawn the second zombie slightly to the right
 					newZombie2.y = zombies[j].y;
 					game.addChild(newZombie2);
 					zombies.push(newZombie2);
 				}