w a s d to move arrow keys to shoot don't touch a zombie or you lose reset game by pressing green flag if you get stuck in a wall, don't worry. the blocks move around periodically. when you are familiar with the controls, press easy or hard (if it says Esav, that just means easy.)
Huge credit to my friend topester (topey) for making the scaffold to this project. Credit to whoever made the sprites (because I sure didn't)