Reminds me of Crypt of the Necrodancer. The only thing I would change, is the max combo. Even after I beat the guy once. I went back to try and get a x200 combo to beat him in one hit, but unfortunately, that was not possible. That, and beating him on 3 hearts, would be the ultimate flex here.
I also really enjoyed the music to the game, which was very well made. Rhythm games are hard to make, due to the fact that if you're off in the programming by just the slightest bit, it doesn't feel good, but this one was. This one felt very good to play.