i think any sort of tutorial, how to control text, or a line indicating the travel path for the ball would be insurmountable in the playability of the game. i was stuck for a few minutes trying to just figure out how to move the ball, and i only got it because I was trying out many different things.
more levels would also be great, once i figured out how to play i saw the potential for the game, only to have one level total.
great idea but lacks some much needed guidance for the player.