It's a neat concept, but unfortunately I didn't get very far.
Despite the text tutorial it wasn't immediately clear what I was supposed to do and I thought the game was broken or unfinished for a moment. This might be because there's no hint for the controls or because it's not entirely clear which symbol is the player. Animating the star would help, too.
There was some glitchiness associated with the dialogues because the skip button is the same as the start/interact button. It's excusable, though, even having the skip facility in a jam game is nice.
What little bit of the story I saw piqued my interest for sure, and the rhythm section seemed to be an interesting take on things. I never got past the first note, though...
This game is completely unplayable for me because of the controls. It seems to be set up for AZERTY which maps the direction keys in a seemingly random fashion on a QWERTY keyboard. To be honest this is an aspect of internationalization I've never thought of and I'm sure I've put out games that are difficult for you and others with non-QWERTY layouts to play.