Just to set the record straight, this game was created and released by the American branch of Nintendo, the only Mario game, I think, that can claim such. The Japanese branch released their own Super Mario Brothers 2 around the same time period, which was very similar to the first in gameplay, except that Luigi could jump higher, and the game was much harder. The Japanese version was released in America under the title Super Mario Brothers: The Lost Levels as part of the Super Nintendo pack Super Mario All-Stars some years later.