hold f to see your rank hold e to see high score movement:-WASD shooting:-use mouse to point and click the mouse to shoot powerups:-pick up powerups it will boost your abilities if the score reaches 30 a fast zombie spawns if the score reaches 50 a new type zombie spawns if the score reaches 100 a boss zombie spawns the new ranking system there are six ranks you have to kill a certain amount of zombies to get a new rank