Intresting
I dont knwo if this is just me but that is a fresh intresting idea... my suggestion is to brush up on it, meaning:
Better graphics: improve the look of the players and get a more clearer less pixelated background
Longer duration: make a longer fight by using comical ways of getting health back or some sh*t like that
Strange/different advancement ideas: create strange characters guest character make a whole tourney and use different style games like this suck as tekken and soul caliber
Good luck il be watching out for more of your work.