I liked the wacky art and music, though it didn't feel that puzzling to me (granted my game isn't a puzzle at all right now so who am I to talk :P). It felt more like an arcade game since it was essentially, "push the blocks into the gaps quickly"
One small suggestion would be to not restart the music on each level and have it play continuously. It sounds strange when it jumps everytime you start the next level.
Congrats on your first jam! :)