Awesome game with an interesting theme! I thought this was one of those weird dentist game for kids with maybe some puzzle mechanic and was partially terrified and very surprised with the flying teeth / bullet hell mechanics.
Just want to recommend to add some invincibility frames after getting hit. I found quite hard in the last level to evade a swarm of piranha-projectiles and the screen divider laser and got killed by back to back hits. And I assume some configuration options for volume and the such will be added, so just pointing that out.