Mark played your game on stream and I had to try it after. Awesome idea and well executed, you do a good job of introducing new mechanics without confusing people (learning that notes can be placed over spikes for instance. Also, the mute background dulling the sound was a nice touch. The only nitpicks I can think of are that after completing the level, you should just let the stage music play instead of the other menu music. Also some coyote jumping would be nice but I am bad so maybe it was in there and I still managed to screw up lol.
I hope you update this after the jam!