Very unique idea! It was super fun, the art was cute, and I had a great time.
Some things to note: I played on normal mode and wasn't able to beat the third enemy, though I got very close. it's difficult to look back and forth at the bottom of the screen and the game as a new player. Once the player learns which attack maps to which number/scroll wheel then it will become easier, but the important thing is making sure the new players can understand it faster. I would recommend maybe having some UI on top of the player that shows which they're currently hovering and which is up and which is down for the scroll wheel.
But overall, a very fun idea. I think if expanded and the UX is touched up a bit it would become a great fun game!