I dont see many bullet hell games in jams, I'm usually not too great at them but I managed to *beat* the game. ;)
I liked the screen transitions & music, points you could improve :
- fullscreen had some whack with it, just have us use the native button itch provides that usually works way nicer.
- keybind labels are incorrect on azerty I had to use ZQSD.
- song volume between intro & game itself were very very different. try balancing those.
I think adding in more songs / levels ( you can pick from ) and polishing out the black & white shifting mechanic would do wonders in this game.