/**** 
* Classes
****/ 
// 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 () {
		self.x += self.speed;
		// Reset enemy position if it moves out of bounds
		if (self.x > 2048) {
			self.x = -self.width;
			self.y = Math.random() * 2732;
		}
	};
});
// Obstacle class
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleGraphics = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
});
// 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 () {
		if (self.movingUp) {
			self.y -= self.speed;
		} else {
			self.y += self.speed;
		}
		// Ensure player doesn't move out of bounds
		if (self.y < 0) {
			self.y = 0;
		} else if (self.y > 2732) {
			self.y = 2732;
		}
	};
});

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

/**** 
* Game Code
****/ 
// Initialize assets used in this game.
var player = game.addChild(new Player());
player.x = 1024;
player.y = 2732 - player.height / 2;
var enemy = game.addChild(new Enemy());
enemy.x = 0;
enemy.y = Math.random() * 2732;
var obstacles = [];
for (var i = 0; i < 10; i++) {
	var obstacle = game.addChild(new Obstacle());
	obstacle.x = Math.random() * 2048;
	obstacle.y = Math.random() * 2732;
	obstacles.push(obstacle);
}
game.down = function (x, y, obj) {
	player.movingUp = true;
};
game.up = function (x, y, obj) {
	player.movingUp = false;
};
game.update = function () {
	player.update();
	enemy.update();
	if (player.intersects(enemy) || obstacles.some(function (obstacle) {
		return player.intersects(obstacle);
	})) {
		LK.showGameOver();
	}
};

===================================================================
--- original.js
+++ change.js
@@ -10,8 +10,13 @@
 	});
 	self.speed = 3;
 	self.update = function () {
 		self.x += self.speed;
+		// Reset enemy position if it moves out of bounds
+		if (self.x > 2048) {
+			self.x = -self.width;
+			self.y = Math.random() * 2732;
+		}
 	};
 });
 // Obstacle class
 var Obstacle = Container.expand(function () {
@@ -34,8 +39,14 @@
 			self.y -= self.speed;
 		} else {
 			self.y += self.speed;
 		}
+		// Ensure player doesn't move out of bounds
+		if (self.y < 0) {
+			self.y = 0;
+		} else if (self.y > 2732) {
+			self.y = 2732;
+		}
 	};
 });
 
 /**** 
@@ -50,9 +61,9 @@
 ****/ 
 // Initialize assets used in this game.
 var player = game.addChild(new Player());
 player.x = 1024;
-player.y = 2732;
+player.y = 2732 - player.height / 2;
 var enemy = game.addChild(new Enemy());
 enemy.x = 0;
 enemy.y = Math.random() * 2732;
 var obstacles = [];
@@ -68,8 +79,10 @@
 game.up = function (x, y, obj) {
 	player.movingUp = false;
 };
 game.update = function () {
+	player.update();
+	enemy.update();
 	if (player.intersects(enemy) || obstacles.some(function (obstacle) {
 		return player.intersects(obstacle);
 	})) {
 		LK.showGameOver();