Subsequent games have elaborated on Mario's jumping-related abilities. "Super Mario World" added the ability to spin-jump, which allows Mario to break blocks under him. Later, the Game Boy version of "Donkey Kong" allows Mario to jump higher with many jumps, and perform a back-flip. In "Super Mario 64", Mario has several jumping abilities, such as a sideways somersault, a "ground pound", which makes Mario hit the ground under him hard, and the "Wall Kick", which propels him upwards by kicking off walls.