The presentation is really stunning, with a ton of visual polish; unbelievable for a game jam! I think the biggest thing you could improve on is music. The melodic plucky synth became grating to the ear really quickly just because it wasn't tonally centered or memorable, and picking a key and staying inside it is a surefire way to avoid this. Not saying the music has to be catchy, but if you're going to use mostly one chord throughout the song has to be carried by some other musical aspect. That could be a strong melody, cool sound design, interesting layering, or many other things. I can tell you've got potential for good songwriting, please keep making more music!