A great submission! You found an innovative and fun mechanic and designed around that. The moment i jumped into the first decent and expected to die, then got flipped was so good.
The graphics are simplistic but look decent and don't get in the way of gameplay. The music you picked is nice, but very overused - I was wishing for a button to turn it off, but keep the effects.
In terms of gameplay i have nothing to point out, it's just a well made, fun game. Good Job!!