===================================================================
--- original.js
+++ change.js
@@ -1,70 +1,80 @@
-/****
+/**** 
 * Classes
-****/
+****/ 
 // Create an Enemy class
 var Enemy = Container.expand(function () {
-  var self = Container.call(this);
-  var enemyGraphics = self.attachAsset('enemy', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.speed = 3;
-  self.update = function () {
-    // Enemy movement logic goes here
-  };
+	var self = Container.call(this);
+	var enemyGraphics = self.attachAsset('enemy', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 3;
+	self.update = function () {
+		// Move enemy left and right
+		self.x += self.speed;
+		if (self.x > 2048 || self.x < 0) {
+			self.speed *= -1; // Reverse direction when hitting screen edge
+		}
+	};
 });
 // The assets will be automatically created and loaded by the LK engine
 // Create a Player class
 var Player = Container.expand(function () {
-  var self = Container.call(this);
-  var playerGraphics = self.attachAsset('player', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.speed = 5;
-  self.update = function () {
-    // Player movement logic goes here
-  };
+	var self = Container.call(this);
+	var playerGraphics = self.attachAsset('player', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 5;
+	self.update = function () {
+		// Move player left and right
+		if (LK.isKeyDown('ArrowLeft')) {
+			self.x -= self.speed;
+		}
+		if (LK.isKeyDown('ArrowRight')) {
+			self.x += self.speed;
+		}
+	};
 });
 
-/****
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-  backgroundColor: 0x000000 // Init game with black background 
+	backgroundColor: 0x000000 // Init game with black background 
 });
 
-/****
+/**** 
 * Game Code
-****/
+****/ 
 // Initialize player and enemy
 var player = game.addChild(new Player());
 player.x = 2048 / 2;
 player.y = 2732 / 2;
 var enemies = [];
 for (var i = 0; i < 10; i++) {
-  var enemy = game.addChild(new Enemy());
-  enemy.x = Math.random() * 2048;
-  enemy.y = Math.random() * 2732;
-  enemies.push(enemy);
+	var enemy = game.addChild(new Enemy());
+	enemy.x = Math.random() * 2048;
+	enemy.y = Math.random() * 2732;
+	enemies.push(enemy);
 }
 // Game update function
 game.update = function () {
-  // Player and enemy update logic goes here
-  for (var i = 0; i < enemies.length; i++) {
-    if (player.intersects(enemies[i])) {
-      // Game over logic goes here
-      LK.showGameOver();
-    }
-  }
+	// Player and enemy update logic goes here
+	for (var i = 0; i < enemies.length; i++) {
+		if (player.intersects(enemies[i])) {
+			// Game over logic goes here
+			LK.showGameOver();
+		}
+	}
 };
 // Game touch events
 game.down = function (x, y, obj) {
-  // Touch down logic goes here
+	// Touch down logic goes here
 };
 game.move = function (x, y, obj) {
-  // Touch move logic goes here
+	// Touch move logic goes here
 };
 game.up = function (x, y, obj) {
-  // Touch up logic goes here
+	// Touch up logic goes here
 };
\ No newline at end of file