I'll be upset if this game doesn't get 1st in sound for this game jam hahah. The dynamic music between/during waves was great. And you really didn't have to do a game over jingle but you DID and you nailed it! Excellent job with the music in a game that is music focused!
You nailed the aesthetic! The key art and game art match the vibe well, and making the objects pulse to the beat really sold some extra personality of the game! One of the most charming games I've played this jam for sure.
I just wanted to be sure but I wasn't able to place units during a wave, was that intentional? You mentioned you didn't have time to balance it the way you wanted and I understand given the time limit. But I think you've got a really cool thing going here if you decide to polish and expand on it. It will definitely have its audience. Groove and cool cats go well together like peanut butter and jelly :) Great job!