Eh...
Needs work...=\ I agree that something should make the two characters unique...It would be nice to have some AI for the player not being used, but it's fun to switch in-between the two and attack people on both sides.
Graphics need to be extremely toned down...This lags even on low quality. ><
It'd be cool if the guns had a bit more ammo and the enemies died in one shot, like they do in normal madness, to try to make that hard you would have to make a massive amount of enemies appear at one time, which is another reason the graphics need to be toned down. Uhm, I don't know what else to say but I had a few other things to point at...