I assume that 3...2..1. has something to do with the beat. (I've tried my best, but still was missing the rhytm sometimes). Well done with the visuals - simple geometric shapes with enough details (nice!).
I'm more facinated how you've managed to make and submit within 1 day. Sounds like a lot of work, well done!
Thanks for the kind words! I spent two nights up til 5am to get this much done, and I just pre-planned stuff like, I wanted it to use basic shapes to save on art time, be played with one-button to limit my mechanics, and use a simple color palette etc. Also there is still some tuning to do to get the beat mathing to feel more intuitive for the player, timing margins and such!