Needs a little work
The biggest problem is the hit detection. Its super buggy. If you run into your opponent, you often get stuck together and you both take a bunch of damage. Also, you bounce all over the place so its pretty hard to move around. Some of the sound samples are very low quality too.
The idea is certainly a good one though. I'd like to see an updated version with better hit detection and controls. I'd be surprised if you didn't make front page if you fix the problems.