Mindless clicking.
I quickly read the moves list, skimmed one of the character profiles, then started. I decided upon simply charging my SP and then doing a fatality - a tactic which saw me through the entire game.
That's my real beed - the 'interactive' part of choosing what to do is almost redundant when a winning objective is so simple and also fairly obvious.
We're just reduced to mindless clicking and waiting for the animations to happen.
Also, I was irritated how after killing Jax the game kinda just froze. Even a screen with text saying, 'you beat the game! Congratulations!' would be appreciated.
I liked how you were totally up-front with all the numbers and it looked as if the RNG played less of a factor here.
Also, graphics and sound were rather good.
I reckon you could have improved this by maybe having the stats for the moves appear in the 'roll-over' frame of all the buttons and also the stats for enemies appear before each match. It'd make sense.
Most importantly though, I honestly think the mechanics need a real re-working.