This is really cool!
The visuals are very good-looking, the sound effects are juicy and bassy, the screenshake is great, the controls are snappy and tight, the part where you destroy the enemies by hitting them with yourself is nice and the "tutorial" in the beginning is basically optimal
The only complaint I have is that the game stops being fun and too repetitive after a while and attacks could be better telegraphed even though they are telegraphed well
Great job! :D