===================================================================
--- original.js
+++ change.js
@@ -1,7 +1,27 @@
 /**** 
 * Classes
 ****/
+// RedEnemy class
+var RedEnemy = Container.expand(function () {
+	var self = Container.call(this);
+	var enemyGraphics = self.attachAsset('enemy', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 2;
+	self.move = function () {
+		// Calculate direction towards player
+		var dx = player.x - self.x;
+		var dy = player.y - self.y;
+		var len = Math.sqrt(dx * dx + dy * dy);
+		dx /= len;
+		dy /= len;
+		// Move towards player
+		self.x += dx * self.speed;
+		self.y += dy * self.speed;
+	};
+});
 // Player class
 var Player = Container.expand(function () {
 	var self = Container.call(this);
 	var playerGraphics = self.attachAsset('player', {
@@ -69,9 +89,11 @@
 var enemies = [];
 var lasers = [];
 // Create enemies at intervals
 var enemySpawnTimer = LK.setInterval(function () {
-	var enemy = new Enemy();
+	// Randomly decide whether to create a normal enemy or a red enemy
+	var isRed = Math.random() < 0.5;
+	var enemy = isRed ? new RedEnemy() : new Enemy();
 	enemy.x = Math.random() * 2048; // Random horizontal position
 	enemy.y = 0; // Start at the top
 	enemies.push(enemy);
 	game.addChild(enemy);
@@ -85,10 +107,10 @@
 LK.on('tick', function () {
 	// Move enemies
 	for (var i = enemies.length - 1; i >= 0; i--) {
 		enemies[i].move();
-		// Remove enemies that go off screen
-		if (enemies[i].y > 2732) {
+		// Remove enemies that go off screen or go too far to the left or right
+		if (enemies[i].y > 2732 || enemies[i].x < 0 || enemies[i].x > 2048) {
 			enemies[i].destroy();
 			enemies.splice(i, 1);
 		}
 	}