Would benefit a lot from a tutorial, "how to play" or simple easy first level, you get thrown into the game not knowing the controls or the goal. I assumed I was supposed to reach the orange box with the ball, but I'm not sure since I never went through the first level. Also since you seem to only have one "throw" until you are reseted to the begining, a "reset" input would have help to reset the game right away when you see you're not gonna make it.