Cool little game! My main suggestions would be to lower the sensitivity of the camera, it's very hard to control and get the camera where I want it to be. The other suggestion I would have is to put some sort of indicator to tell what is the front/back of the ball, doesn't have to be anything intricate; it could be something as simple as a face or arrow. Since the camera can be rotated to the front of the ball, you ball will be backwards from your view, but you're not able to tell and it's a bit confusing.
Nice work! :)