Left arrow – Move left          Right arrow – Move right          Space – Fire laser

P  – Pause/unpause game           Q  – Quit game            S  – Small scale version

Wikipedia:Space Invaders

pace Invaders (スペースインベーダー, Supēsu Inbēdā?) is an arcade video game designed by Tomohiro Nishikado in 1978. It was originally manufactured by Taito and licensed for production in the U.S. by the Midway division of Bally. Released initially in its native Japan in 1978, it ranks as one of the most influential video games ever created. Though simplistic by today's standards, it was one of the forerunners of modern video gaming.