When John Romero made Dangerous Dave, he wanted a game similar to Super Mario. There are definitely similarities that are easily noticeable, such as the secret levels, the level design, the monsters, and the jumping. Although nothing compares to the timeless classic, Dangerous Dave has its own appeal.
The mission is to guide Dave through ten levels, collecting trophies in the hideout of his enemy Clyde. Once you collect the trophy, exit through the door to continue through the next level. The arrow keys are used to move, with up being jump. Starting at level 3, you are introduced to a gun and a jetpack. Use Ctrl to shoot, and Alt to activate the jetpack.