I think that conceptually this was such a clever use of the jam's theme! I really liked the stage ost as well, and the visuals were cute [:
I thought the combat was fun but a little bit difficult to fully grasp. I tried both spinning continuously, and simply directing the tail against the enemies, but both strategies yielded kinda unpredictable results... Maybe the enemy hp could maybe be lowered a little bit instead? The items/abilities helped a bunch though, and was a good way to spice the moveset up a bit!