Do you remember the original Super Mario game? Play it here online:
About the Game (Quoted from Wikipedia):
Super Mario Bros. (Supa Mario Burazazu) is a platform game developed and published by Nintendo in late 1985 for the Nintendo Entertainment System. Super Mario Bros. featured gameplay that changed the way video games were created. It is the first console original in this genre to feature smooth-scrolling levels, which made it a landmark in home video-gaming.
In Super Mario Bros., Italian plumber Mario must save Princess Peach (Princess Toadstool in the US version) of the Mushroom Kingdom from the evil Bowser, king of the Koopas. Mario is aided in his quest by his brother Luigi in two-player mode. In order to save Princess Peach, the Mario Bros. must conquer the eight worlds that comprise the Mushroom Kingdom. Mario (or Luigi) must make his way to the castle in each world and defeat one of the Bowser's evil minions, thereby taking control of that world. In order to reach the castle, however, Mario or Luigi must battle through three "sub-worlds" by either destroying or avoiding Bowser's henchmen. If Mario or Luigi successfully fights his way through the castle and defeats the evil minion, a Mushroom Retainer (later called Toad), is freed. Inside the eighth castle, the Mario Bros. will find Princess Peach.
Read the complete Super Mario Bros. Wikipedia entry here.