Wow, that's a big install for a jam game!
It's a nice concept, but could use some work... Higher frame rates are a must - A few rame drops on a GTX1080... Although worked OK on my machine with an RTX2080Ti
A couple of suggestions though:
The buttons for playing the notes should be lines up better with where they come down.
There should be a penalty for playing notes when there aren't any to be played. (I got quite far by just mashing all 4 keys)