This is really pretty good
Not seen a game like this before, voted 5 for originality.
1) A couple of suggestions for you to think about if you're planning future versions:
Maybe an animation of the clown falling, when you lose your last life?
2) Maybe make it so the background scrolls in the opposite direction to the way the clown's leaning? (As in, the ball rolls in that direction). Then maybe you could even add certain things dropping down which he has to avoid?
3) Make the clown juggle...
I'm not saying you MUST put these in, it's perfectly fine as it is, but if you're looking for inspiration on further development, maybe one of these could be fun to add.
Keep up the good work.