Super Mario Bros.: The Lost Levels is a 1986 side-scrolling, platformer action game developed and published by Nintendo as the sequel to the 1985 Super Mario Bros. The games are similar in style and gameplay apart from a large increase in difficulty. Like the original, Mario or Luigi venture to rescue the princess from Bowser. Unlike the original, the game has no two-player option and Luigi is differentiated from his twin plumber brother by having less ground friction and higher jump height. The Lost Levels also introduces setbacks like poison mushroom power-ups, counterproductive level warps, and mid-air wind gusts. The main game has 32 levels across eight worlds, followed by five bonus worlds.