Just the classical WASD controls, and left click/hold mouse to shoot. F to open the shop, and Esc to close shop. The zombies never stop, so you must gather enough coins to upgrade and buy your gear. Power-ups spawn from time to time, they all give the player some helpful buffs of some sort. Some buffs like the reload buff are time-limited, others are just one-time. Once in a while, a very powerful Zombie King will spawn, and it has the abilities to shoot out six zombie projectiles at a time, and also summon waves of zombies where it's standing on its own.