Zombie Types and Instructions. Instructions: Simply run around and kill the zombies to try and get the highest score. Controls: WASD or Arrow Keys to move your character. Space or click to shoot. You use the mouse to aim your gun. Zombie Types. Small Green: Medium speed, small damage. Big Green: Slow Speed, big damage. Fast (Blue): Fast speed, medium damage. Special (Yellow): Medium Speed, medium damage but has a chance of healing you also. Survivor: Recently infected, as fast as you, appears at the high score. BOSS GREEN: 15 lives, slow speed, big damage, appears once.
