Use the arrow keys to move and the z key to shoot.
You have a limited number of bullets, displayed in the top left.
Press Enter to start the invasion! Zombies wil start to pop up at random locations, and then become shootable once they have fully spawned. Once shot, a zombie will leave a bullet pick up which you can then proceed to? pick up. You will also recieve a bullet for every second you survive after starting the invasion.
Civilians will spawn every 5 seconds. They will attempt to follow you. Watch out! If they touch a zombie, they?ll turn into one. You can shoot them before this happens, but you?ll lose a point?