Escape from Epsilon

Game description:

Slyvester Biffdrop has been imprisoned in the bottommost of five deadly dungeons. Your task is to help him escape from all five levels. You start in Alpha, the easiest, and work your way up to the terrible Epsilon!

You can move Slyvester to the left and right with the joystick, and can make him jump with a push of the trigger. In each level, Sly begins at the leftmost point of the dungeon. To escape from each level, he must make his Way to the dungeon's extreme right edge. To accomplish this, he must travel from screen to screen, overcoming obstacles, finding keys and opening doors.