I really like how the hazards are all timed to the music, and the music seems to build as I go through the level, that was very cool. Fun character & enemy designs too.
I do wish there was more clear feedback on death. For example, I was unclear what was actually killing me for a while because I thought the sound waves from the speakers were decorative, I didn't realize the red waves killed me. The camera was also a struggle, it felt like it was lagging behind me where I'd prefer it to lead ahead. The movement felt surprisingly heavy and it felt like inputs got dropped sometimes (maybe I'm too used to games with generous buffers?). I realized quickly that I can jump infinitely in the air by shooting repeatedly which broke a lot of the level design. Also the respawn time is very slow which feels bad in a game that kills you in 1 hit.