Very good.
This flash has just about everything that a fighting game should have.
What I would recommend would possibly be more variation in advantages and disadvantages.
Regarding Hank, he is an awesome character when you get used to his attacks and his last level is a great change from the other Stages.
I think you should make another survival mode where you have to fight off as many Madness guys as you can until you die, Sort of like in Hanks final Stage.
Verdict:
The best fighting game and possibly the best game on NG. If you keep adding new characters and maps, it will be awesome. =D