Had fun! maybe some unlockables to change your stats (max velocity or floatyness)? showing a trail of a certain length behind you could help read the direction your player is going and block bullet and let the player be more expressive?
I read the devlog after playing and did not know your game before, and I felt the execution was pretty clean.
I choose "let bullet time to appear (to not damage player at spawn)" as the one I approve the most. this make it more approachable to unfamiliar players.