I really love the visual style. The retro color palette makes a lot here. The scenery in first track is something you want to frame and put on a wall.
All three music tracks sounds really good and it was fun to play.
I was not sure about the responsivity/precision regarding the rhythm game part on some places. There were parts where I felt it is a little bit off, but then there was a part that felt good fitting. But this can be an issue on my side. :-)
For the theme, it would be nice if all track were set in some strange place, not only the first one. Especially when we saw how creative you can be with the flying cars one.
Overall it is a great entry and I wish you will keep working on more content in the future!