I loved the style and idea!
Very interesting take on the theme.
Constructive Criticism:
The controls felt really clunky
To me it felt as though the opponents are too accurate when swinging and they practically could not miss when the player is in range, so cannot round around them etc. Tweaking the Enemy AI could make a huge difference.
The pacing with two opponents on the second round felt too much (Or I suck ;P).
Overall a good packaged project, good job!