So far the best music-themed game I've played this jam, could be a really nice educational game! I'm always a little unhappy when the camera's y position strictly follows the player in platformers, but I could live with it. Two minor music theory nitpicks:
- Strictly speaking, you'd need to put a treble clef at least somewhere to correctly identify the notes. I know this is pretty nitpicky, but as someone who mostly reads bass clef nowadays I feel bullied ;) Might also be a fun thing for the future to add other clefs!
- In level 3, you specifically ask for the F minor harmonic scale, which would have a raised seventh, i.e. an E instead of an Eb.
Also a weird bug in level three where there were two Db notes and collecting both of them prevented us from solving the level.
Apart from those nitpicks, I really like where this is going! Also a really nice touch that all the background music was in the correct key!