Thanks for the great feedback, it's really appreciated!! <3
I agree that the wave system and difficulty curve would benefit a lot from finetuning, and if I had more time I'd focus on that next.
For the health bars, I could probably add a red pulsating animation for low health. The slow healing is kind of intentional, I'd rather change enemy pacing and difficulty than increase healing.
The menu would be a good QoL addition, I kind of tunnel-visioned on the minimalist approach too long...
That being said, I'm very happy that you enjoyed my silly serious game already, "fun and chaotic" is exactly what I was going for :D