So first off all, this is very well done and polished. I enjoy the animations and the way you put the mechanics together. I think it combines Intralism with Osu, but those aren't my cup of tea, so I'm not going to judge that. So here is some more general feedback that is still useful, I hope:
1. When you teach me how to use the swap, there is a visual bug where when you fail to press the input in time, there is another "miss" impact, but at the target. It's a small visual thing, but it was large enough to be noticed.
2. More importantly: when you teach me how to use the swap, there is NO feedback when you fail to use the second input properly. It is obvious for you, but it took me a while to figure out how to use it because I did it incorrectly, but still got a "Perfect!" every time.
3. I personally would have liked to use cursor in the main menu.
What I liked even though I don't like the music genre:
1. the delay calibration: that is very impressive and I imagine important for games like these. The fact you managed to put it into the jam is outstanding. A functional settings menu is very nice in the first place.
2. web serialization: very cool that my score is being saved.
3. how the menu reacts to the menu being played. I assume the icon changes its BPM? That's cool!
