Overall the aesthetic was great. The visual theme was cohesive, the music worked well with the play, and the art was fun. The play was a bit repetitive. I spent a lot of time dodging enemies until I realized that nothing actually happens when you run into them. I also feel like there wasn't a clear indicator of progress during play. It took me a good bit to even notice the screen was scrolling faster. After a couple of plays, I topped out at 615. I don't know if there's an endgame, but that's as far as I got.
Altogether this was a solid jam entry. I'm sure if you had more time you could flesh out some of the play and have a bit more variety. Still, I had fun with it while I played.