This is the first version of this game. We may make it a multiplayer game in the following version. But for some reason, we can't do this in version 1.0. Just wait the updates of the game.
You need to push the boxes and find a way to the end. When you passed a level in hard mode, you will get a star. It is so difficult to get all the stars of this game. Don't believe it? Just download it and try it now. Submit your score to the gamecenter and find out if your stars are more than your friends.