It ain't that bad.
I thought this game was original and fairly entertaining. Good job, especially for it only being your second game submission.
I do agree though, the hulk has a bit too much health. But, it is beatable (I did it on my second attempt).
For your next version, I'd suggest adding the ability to play as multiple charecters and have some sort of teir based system of opponents to play against.
PS
The blood coming out of the people standing in the background when you use "lightning" is moderately funny, but hard to notice. What were you going for with this, subliminal messages? ;)