This is such a great take on the theme!
As others have said the character design, artwork, and music is all spectacular.
Beyond that I think the mechanics are really cool. Refining fighting games to that paper scissors rock type gameplay and then combining that with one button controls made for a really interesting experience. I liked how pieces of counterplay slowly revealed themselves like waiting for a block-breaker to jab etc.
I would love to see this developed further with some more content!
Awesome game, thanks for making it :)