Very cool idea supported by great art, music, effects and gameplay.
This was fun to play. I loved the sprites and animations with the small explosions on the bullets, and the music and sound effects were amazing. The gameplay is fairly simple but in a good way. It's enjoyable but not complex and hard to learn. It didn't really fit the theme, and I agree with others that upward aiming and shooting while moving would be nice, but I understand the limitation of the Jam time restriction as I also had to change and cut a few things from my game.
Overall, a very fun game that could definitely be built into something even greater.