An average game
This concept has been done before, and not to sound harsh, but you really haven't added anything different. If you're willing to put more effort into it, I might suggest an insane mode, just for those who really want to challenge themselves. Also, check your code. The ball can still fall through the crack as long as the halfway point is over empty space, meaning the other half of the ball somehow slides through solid wall. Graphics are good, but the fading ball makes it kind of hard to determine the exact location.