Cool that you were able to make a guitar hero style game this quick! Anyway one thing I do want to mention is I'm doing a review of design on the games in this jam so here's a shameless plug to my channel if you want to be notified of the vid when released: https://www.youtube.com/channel/UC7Vj46GGL9VMUvd4YTMtjXg
It was totally a huge rush job that was started on Saturday morning and then finished right near the deadline. Wish I had the time (and skill) to make better art, but functionally the game is more or less good with some noticeable bugs.
Not really sure what you could grab design-wise from this game, but would like to see some videos on the games. Are you planning on making design analysis videos of all the ones you're reviewing?