/**** 
* Classes
****/ 
// Alien class representing enemy characters
var Alien = Container.expand(function () {
	var self = Container.call(this);
	var alienGraphics = self.attachAsset('alien', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 3;
	self.update = function () {
		// Update logic for alien
		// Calculate the direction vector between the alien and the player
		var dx = hero.x - self.x;
		var dy = hero.y - self.y;
		var magnitude = Math.sqrt(dx * dx + dy * dy);
		// Normalize the direction vector
		dx /= magnitude;
		dy /= magnitude;
		// Move the alien towards the player
		var newX = self.x + dx * self.speed;
		var newY = self.y + dy * self.speed;
		// Check if the alien would intersect the wall
		if (!self.intersects(wall)) {
			self.x = newX;
			self.y = newY;
		}
	};
});
// Barrier class representing the barrier in front of the command base
var Barrier = Container.expand(function () {
	var self = Container.call(this);
	var barrierGraphics = self.attachAsset('barrier', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 20; // Initialize the barrier with 20 health
});
// Bullet class for projectiles
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.update = function () {
		self.y -= self.speed;
	};
});
// CommandBase class representing the target to destroy
var CommandBase = Container.expand(function () {
	var self = Container.call(this);
	var baseGraphics = self.attachAsset('commandBase', {
		anchorX: 0.5,
		anchorY: 0.5
	});
});
//<Assets used in the game will automatically appear here>
//<Write imports for supported plugins here>
// Hero class representing the player character
var Hero = Container.expand(function () {
	var self = Container.call(this);
	var heroGraphics = self.attachAsset('hero', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 10;
	self.update = function () {
		// Update logic for hero
	};
});
// Wall class representing a barrier that blocks aliens but allows bullets
var Wall = Container.expand(function () {
	var self = Container.call(this);
	var wallGraphics = self.attachAsset('barrier', {
		anchorX: 0.5,
		anchorY: 0.5
	});
});

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

/**** 
* Game Code
****/ 
// Initialize game elements
var background = game.addChild(LK.getAsset('background', {
	anchorX: 0,
	anchorY: 0
}));
var hero = game.addChild(new Hero());
hero.x = 1024;
hero.y = 2400;
var commandBase = game.addChild(new CommandBase());
commandBase.x = 1024;
commandBase.y = 200;
// Initialize the barrier and position it in front of the command base
var barrier = game.addChild(new Barrier());
barrier.x = 1024;
barrier.y = 180;
var wall = game.addChild(new Wall());
wall.x = 1024;
wall.y = 1500; // Position the wall at a specific Y coordinate
var aliens = [];
var bullets = [];
var commandBaseHits = 0; // New variable to keep track of the number of times the command base has been shot
var playerHits = 0; // New variable to keep track of the number of times the player has been hit by aliens
// Function to handle movement
function handleMove(x, y, obj) {
	hero.x = x;
	hero.y = y;
}
// Function to handle shooting
function shoot() {
	var bullet = new Bullet();
	bullet.x = hero.x;
	bullet.y = hero.y;
	bullets.push(bullet);
	game.addChild(bullet);
}
// Function to spawn aliens
function spawnAlien() {
	for (var i = 0; i < 3; i++) {
		// Spawn 3 aliens at a time
		var alien = new Alien();
		alien.x = Math.random() * 2048;
		alien.y = 0;
		aliens.push(alien);
		game.addChild(alien);
	}
}
// Game update loop
game.update = function () {
	// Update bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		bullet.update();
		if (bullet.y < 0) {
			bullet.destroy();
			bullets.splice(i, 1);
		}
	}
	// Update aliens
	for (var j = aliens.length - 1; j >= 0; j--) {
		var alien = aliens[j];
		alien.update();
		if (alien.y > 2732) {
			alien.destroy();
			aliens.splice(j, 1);
		}
	}
	// Check for collisions
	for (var k = bullets.length - 1; k >= 0; k--) {
		var bullet = bullets[k];
		for (var l = aliens.length - 1; l >= 0; l--) {
			var alien = aliens[l];
			if (bullet.intersects(alien)) {
				bullet.destroy();
				alien.destroy();
				bullets.splice(k, 1);
				aliens.splice(l, 1);
				break;
			}
		}
		// Check if bullet hits the barrier
		if (bullet.intersects(barrier)) {
			bullet.destroy();
			bullets.splice(k, 1);
			barrier.health--; // Decrement the barrier's health
			if (barrier.health <= 0) {
				barrier.destroy(); // Destroy the barrier if its health reaches 0
			}
		} else if (bullet.intersects(commandBase)) {
			bullet.destroy();
			bullets.splice(k, 1);
			commandBaseHits++; // Increment the commandBaseHits variable
		}
	}
	// Check if player has been hit by an alien
	for (var m = aliens.length - 1; m >= 0; m--) {
		var alien = aliens[m];
		if (alien.intersects(hero)) {
			alien.destroy();
			aliens.splice(m, 1);
			playerHits++; // Increment the playerHits variable
			break;
		}
	}
	// Check if command base has been shot 25 times
	if (commandBaseHits >= 25) {
		LK.showGameOver();
	}
	// Check if player has been hit by 3 aliens
	if (playerHits >= 3) {
		LK.showGameOver();
	}
};
// Event listeners
game.move = handleMove;
game.down = function (x, y, obj) {
	shoot();
};
// Spawn aliens at intervals
LK.setInterval(spawnAlien, 2000);

===================================================================
--- original.js
+++ change.js
@@ -90,8 +90,12 @@
 /**** 
 * Game Code
 ****/ 
 // Initialize game elements
+var background = game.addChild(LK.getAsset('background', {
+	anchorX: 0,
+	anchorY: 0
+}));
 var hero = game.addChild(new Hero());
 hero.x = 1024;
 hero.y = 2400;
 var commandBase = game.addChild(new CommandBase());