I managed to get to where I could see the second musical note but I couldn't get it because the jump was a little too far and I would bump into the ceiling. I'm not sure if there was some kind of dash that I needed to collect but I couldn't find anything. The first note attack didn't seem to work on any of the other red gates past the first one. Sad if I missed something here, but overall I think the game was a neat experience with a fun twist in using the musical notes to open doors. Nice work!