The graphics very simple, poor even, but you made it to be a good thing, the camera and speciall effects did the trick, good job!
The gameplay also very good, the reverse mode tricky but i was able to overcome it.
But the level unlock times too high:( I wasn't able to unlock the second level, and I really wanted, because the level select menu was beautiful...
An advice, from my experiences in this jam - make the game VERY EASY, at least the game jam edition. People don't have enough time to polish their skill because they have to rate many games.
Oh, and the sounds really made the controls feel responsive - good job!
Otherwise, a simple but effective idea. It was fun to play!