 The game's difficulty picks up from near the end of the original and progressively increases. The Lost Levels introduces obstacles including poison mushrooms, level warps that set the player farther back in the game, and wind gusts that redirect the player's course mid-air. Some of the game's levels require "split-second" precision. There were also some graphical changes, though the soundtrack is identical. After each boss fight, Toad tells Mario that "our princess is in another castle!" The main game has 32 levels across eight worlds and five bonus worlds. A hidden World 9 is accessible if the player does not use a warp zone. Bonus worlds A through D are accessible when the player plays through the game eight times, for a total of 52 levels.
