In Zombiestreet you must survive as long as you can. You can survive allone or with an CPU Player. You can play in the normal mode or in the fun mode. In the Fun mode you are Harry Potter and when you shoot the zombies making tones. The game is german but here are the instroductions of english:

wasd = move
Mous = aim and shoot

Here is the link: http://scratch.mit.edu/projects/3043796/