===================================================================
--- original.js
+++ change.js
@@ -1,120 +1,127 @@
-/****
+/**** 
 * Classes
-****/
+****/ 
 //<Assets used in the game will automatically appear here>
 // Bullet class
 var Bullet = Container.expand(function () {
-  var self = Container.call(this);
-  var bulletGraphics = self.attachAsset('bullet', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.speed = -10;
-  self.update = function () {
-    self.y += self.speed;
-  };
+	var self = Container.call(this);
+	var bulletGraphics = self.attachAsset('bullet', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = -10;
+	self.update = function () {
+		self.y += self.speed;
+	};
 });
 // 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 = 5;
-  self.update = function () {
-    self.y += self.speed;
-  };
+	var self = Container.call(this);
+	var enemyGraphics = self.attachAsset('enemy', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 5;
+	self.update = function () {
+		self.y += self.speed;
+	};
 });
 // Player class
 var Player = Container.expand(function () {
-  var self = Container.call(this);
-  var playerGraphics = self.attachAsset('player', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.shoot = function () {
-    var bullet = new Bullet();
-    bullet.x = self.x;
-    bullet.y = self.y - playerGraphics.height / 2;
-    bullets.push(bullet);
-    game.addChild(bullet);
-  };
+	var self = Container.call(this);
+	var playerGraphics = self.attachAsset('player', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.shoot = function () {
+		var bullet = new Bullet();
+		bullet.x = self.x;
+		bullet.y = self.y - playerGraphics.height / 2;
+		bullets.push(bullet);
+		game.addChild(bullet);
+	};
 });
 
-/****
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-  backgroundColor: 0x000000 //Init game with black background 
+	backgroundColor: 0x000000 //Init game with black background 
 });
 
-/****
+/**** 
 * Game Code
-****/
+****/ 
 // Initialize arrays and variables
 var bullets = [];
 var enemies = [];
 var player = game.addChild(new Player());
 player.x = 2048 / 2;
 player.y = 2732 - 200;
+var playerDirection = 1;
 // Score display
 var score = 0;
 var scoreTxt = new Text2('0', {
-  size: 150,
-  fill: "#ffffff"
+	size: 150,
+	fill: "#ffffff"
 });
 scoreTxt.anchor.set(0.5, 0);
 LK.gui.top.addChild(scoreTxt);
 // Handle shooting
 game.down = function (x, y, obj) {
-  player.shoot();
+	player.shoot();
 };
 // Update game state
 game.update = function () {
-  // Update bullets
-  for (var i = bullets.length - 1; i >= 0; i--) {
-    bullets[i].update();
-    if (bullets[i].y < -50) {
-      bullets[i].destroy();
-      bullets.splice(i, 1);
-    }
-  }
-  // Update enemies
-  for (var j = enemies.length - 1; j >= 0; j--) {
-    enemies[j].update();
-    if (enemies[j].y > 2732 + 50) {
-      enemies[j].destroy();
-      enemies.splice(j, 1);
-    }
-  }
-  // Check for collisions
-  for (var k = bullets.length - 1; k >= 0; k--) {
-    for (var l = enemies.length - 1; l >= 0; l--) {
-      if (bullets[k].intersects(enemies[l])) {
-        bullets[k].destroy();
-        enemies[l].destroy();
-        bullets.splice(k, 1);
-        enemies.splice(l, 1);
-        score++;
-        scoreTxt.setText(score);
-        break;
-      }
-    }
-  }
-  // Spawn enemies
-  if (LK.ticks % 60 == 0) {
-    var enemy = new Enemy();
-    enemy.x = Math.random() * 2048;
-    enemy.y = -50;
-    enemies.push(enemy);
-    game.addChild(enemy);
-  }
-  // Check for game over
-  for (var m = enemies.length - 1; m >= 0; m--) {
-    if (enemies[m].intersects(player)) {
-      LK.effects.flashScreen(0xff0000, 1000);
-      LK.showGameOver();
-    }
-  }
+	// Update player's position
+	player.x += 5 * playerDirection;
+	// Change direction if player hits the edge
+	if (player.x > 2048 - player.width / 2 || player.x < player.width / 2) {
+		playerDirection *= -1;
+	}
+	// Update bullets
+	for (var i = bullets.length - 1; i >= 0; i--) {
+		bullets[i].update();
+		if (bullets[i].y < -50) {
+			bullets[i].destroy();
+			bullets.splice(i, 1);
+		}
+	}
+	// Update enemies
+	for (var j = enemies.length - 1; j >= 0; j--) {
+		enemies[j].update();
+		if (enemies[j].y > 2732 + 50) {
+			enemies[j].destroy();
+			enemies.splice(j, 1);
+		}
+	}
+	// Check for collisions
+	for (var k = bullets.length - 1; k >= 0; k--) {
+		for (var l = enemies.length - 1; l >= 0; l--) {
+			if (bullets[k].intersects(enemies[l])) {
+				bullets[k].destroy();
+				enemies[l].destroy();
+				bullets.splice(k, 1);
+				enemies.splice(l, 1);
+				score++;
+				scoreTxt.setText(score);
+				break;
+			}
+		}
+	}
+	// Spawn enemies
+	if (LK.ticks % 60 == 0) {
+		var enemy = new Enemy();
+		enemy.x = Math.random() * 2048;
+		enemy.y = -50;
+		enemies.push(enemy);
+		game.addChild(enemy);
+	}
+	// Check for game over
+	for (var m = enemies.length - 1; m >= 0; m--) {
+		if (enemies[m].intersects(player)) {
+			LK.effects.flashScreen(0xff0000, 1000);
+			LK.showGameOver();
+		}
+	}
 };
\ No newline at end of file