OMG!! Super Mario Bros. Crossover

[CallMeWilliam]

From the site...

It is a remake of Super Mario Bros on the NES, and appears just as the original version did, but gives players the option to play as characters from other games in addition to Mario, and comes with more features, such as cheats, difficulty levels, new modes of play...for more, play the game!

Wiki: http://www.explodingrabbit.com/wiki/Super_Mario_Bros._Crossover
Actual Game: http://www.explodingrabbit.com/games/super-mario-bros-crossover