I really liked the aesthetic and the music! I'm impressed you made it during the jam. I had some issues running the game in webgl like the music not starting unless I rewound it and it was a bit laggy. In a post-jam version, it might be useful to the player to have a tutorial level at the beginning to get to grips with the core mechanics and how different sections of the music do more damage (which I thought was really cool!). Hope you're able to continue working on this, it was pretty fun!