defend skullheadworld shoot skulls at invading skulls collect skulls to protect your skull flush skulls to upgrade part single-stick bullet-hell shooter, part top-down physics brawler. super addictive arcade fun. simple, responsive and accessible controls- just move your skull and it will take care of the rest. no buttons, no combos. fluid procedural animation and high-quality frame rate. unlock and discover new characters and weapons! compete on leaderboards across increasingly intense difficulties. supports game controllers, keyboard or mouse. couch co-op too. no loading screens, advertisements or in-app purchases.