I beat up those fellas, and I have a couple thoughts on the experience. The fighting is slick, with the main sauce coming from the dash attack being the main lead into a combo. The world is a tad empty and the difficulty wavers based on strange hitboxes. However, the main artwork is really quite good! It definitely makes up for a bit of the responsiveness from finishing off an enemy. I would like to mention that, when you lose, going back and hitting play causes all movement to be incredibly slowed, and I'm pretty sure this is because the unity timescale wasn't reset. Just though I'd mention that.
Other than that, neat ideas!