It's insanely impressive that you managed to make, yourself, music that dynamically changes with the gameplay. With that being said, the game mechanics aren't exactly clear (not even with fayedamaras explanation). I just ended up spam clicking the notes and it worked out fine. The minimalist theme and UI you were going for is inspiring, but I think the notes and blocks(?) could really benefit from some smoother movement or animations instead of just "glide to random position" or showing and hiding over and over again, since they're really the only things on screen.