Fun game! Liked the chaotic and difficult nature of it.
General aesthetic was nice. Liked the simple pixely art style, and the music definitely added to the experience. Shooting mechanics were fun as well, you wouldn't think a jerky camera would work, but I found it added to the gameplay.
For improvements, maybe add a bit more variety to the levels, rather than just more enemies. A timer would also be cool, would let people speedrun it a bit.
Overall, good submission. Well done!