W, a, s, d and tap to shoot. BEWARE OF THE GUYS WITH RED EYES! THEY WILL INSTA KILL YOU! I also made the other zombies super weak but the military zombie has 300 health, so, good luck!
Credit to @Asimo. Double click the green flag to go again. It’s so hard to even get 200 kills. I added reloading. Either run outa ammo or press R.