I really like your art style.
The gameplay is basic but solid.
I found the camera movement a bit annoying. The game is mostly about shooting stuff and not so much about navigating the environment. So it would have been better to move the camera towards the shooting direction instead of towards the movement direction.
The music is nice, but doesn't really fit very well IMO. The game looks goofy and plays hectic, while the music is futuristic and relaxing.