I actually really like this game (My inner masochist is showing, but whatever)
The only thing I would change is the lack of count outs and TKOs. Maybe make the fights shorter by decreasing the starting health and stamina.
Besides that, if I was the developer and not you, I'd make this women's boxing instead, but again, that's the inner masochist coming out.
Anyways, all that aside, I like the game a lot. It's not realistic or a simulator, but it's good.