The game is very good. It's simple but challenging and the music is great. One thing that I will point out though is that I sometimes get the attack and dodge buttons confused, because of how similar the animations are. Other than that, the game is really fun and visually great.
Also, you can configure the game with Newgrounds' scoreboard system, so that everyone can view each other's scores. I think that'll increase incentive for people to play the game here.