Nice game! Funny thought: could be made into a rythm game.
I like the art a lot and how the player face is shown.
That's an interesting idea! I originally also had the music become more reverby and distorted when you switch to spirit view (like listening to it underwater or in another room), but that effect unfortunately didn't make it into the export for whatever reason. I liked the idea of changing the mood of the soundtrack when switching between realms, which would work nicely in a rhythm game too!