Commander Keen 1: Marooned on Mars (Invasion of the Vorticons) Game

"Marooned on Mars" (first released as shareware on December 14, 1990) While Commander Keen is exploring Mars, the Vorticon steal four vital components of his ship and hide them in Martian cities, each guarded by a Vorticon soldier. In this episode, Keen acquires his trademark pogo stick and meets a variety of Martian aliens and robots.
Each game uses different controls, most DOS games use the keyboard arrows. Some will use the mouse , "Alt" ,"Enter" and "Space bar".