It could be better. When Johny flies towards the wall his legs go first and then his body. It is really weird. And then before he touches the wall, they meet up again. Might want to do something about that.
I would have made Shao Kahn's Wrath Hammer rotate as it flies across the screen (It seems pretty unrealistic that it would just go straight across like that).
You need to start using sound buddy. You have good effects, the animation is a little choppy and I think you could of used a better sprite for when johnny hit the wall (believe me, I know).
The effects are nice (like all your work) but the animation its self isnt that good. It takes too long for kahn to shoot the beam thing, and when he hits the wall , johnny's position is messed up and it looks weird. It also takes way too long for kahn to throw the hammer, and when he does (like ]{ said) it should spin. Theres also a problem then the hammer hits the wall, the blood looks weird and the hammer just staying there looks weird too.