Thank you so much for playing!
I dont think any of the feedback here is negative, it's quite helpful! I agree with alot of the points you bring up. I suspect we'll do a pass over the game to improve these points after the jam rating is over.
Regarding color blindness.... we did actually almost solve it. We had originally done guitar hero style notes with different shapes, but at the last second we had to change the gameplay, which unfortunately reintroduced this issue again.