I had 3 slight issues.
1. Unity provides the fullscreen button. The one from itch doesn't work properly so you should turn it off.
2. When the blue dot appeard I always died when it ran out. (Maybe a bug?)
3. This should have a restart button please.
But the art is great and the music energetic. The mechanics are varied and (probably because I never play bullethell stuff) I've never seen them before.