Awesome game - thank you for making it!
It's really nice to see a rhythm game. I am not great with timing but I think the controls are a bit too much on the strictness side. You can add some allowance (+/- 200 miliseconds for example) before and after the ideal time.
Also it seems that the second level is somewhat worse calibrated than the first?... Not sure..
Probably you didn't have time to implement more feedback - visual, auditory. But for a rhythm game with precise timing this is vital - it makes or breaks the experience.
I liked how at the beginning of level 2 there is a circular pattern which counts down in clockwise direction. That is manageable. But when there are arrows all over the screen it becomes way too hard to keep track of everything.
You definitely put a lot of effort for this and it would be great to see how you polish it after the jam. Good luck! Keep it going!