I'm in love with the shooting animation in unison with the music. Shooting and dashing in rhythm with the music is incredibly satisfying. I want to see this take inspiration from titles like "Crypt of the Necrodancer", "Beat Hazard" and "Patapon" where your performance is directly linked to how you respond to the rhythm and music. This could be further accentuated by having the BPM of the music be linked to particle/light/shader effects, and enemies animations trigger "on the beat".
Not sure if it broke for me, but I had to go look for enemies stuck around the edges and didn't lose a single hp, collected all the dust from around the map and went over it twice to make sure it was completely empty. Nothing happened, no new spawns or anything, both times.