WASD to move, space bar to attack. When your killstreeak is at 30 you can drop a nuke on the zombies.
I made this quite a while ago, and i haven't been doing nearly as much stuff in scratch. Anyhow, I came back to look at a few of my old projects, and remembered this one that I never shared. Obviously I never finished it, but I think its still kinda fun anyway! Thanks! Feel free to remix this and finish it!