I was just messing with it, it all seems to work. Nice job. I didnt even know you could do some of this stuff, like make peoples screens black&white lol.
The cone shit is hilarious.
In my personal opinion, I think you went to too much of the "mild" side of things. Need a little bit more "punch" to them.
Like the sentry one. You should just spawn it with the normal amount of ammo. The very minimal ammo you gave it makes it almost useless.
The hothead roll doesnt have any effects. You should add something to that. Why not just set them on fire for a negative effect? The cool particle attached to their heads with being on fire is a cool visual...