World 2 (Super Mario Bros.: The Lost Levels)

World 2 is the second world found in the Japanese version of Super Mario Bros. 2. It is also the first world in the game that all levels take place at night.

World 2-1

This is the first level in the game to take place at night. The player starts off standing near a bridge, which the player must cross on the way to the flag. A flock of jumping Koopas can be found on the bridge, which the player must avoid. There will be three blocks above the bridge, two of which contain coins and the other of which contains a Super Mushroom/Fire Flower (optional). After navigating the bridge, the player must jump over a hole and climb a short staircase. Atop this staircase are three blocks, one of which contains a Starman, but it is not required to clear the level. Next will be a large gap with a few pipes in it. To be able to clear this gap, the player must jump on the pipes while avoiding the piranha plants hidden inside.

After avoiding the piranhas, the player will encounter a Super Spring, which can be jumped on to clear the gap. There will be an area with a floor of blocks, one of which contains a vine. If the player chooses to climb this vine, they will reach a Coin Heaven. There is also a hidden 1-Up block on a platform above the level, which the player will fall on after dying in the Coin Heaven.

Then after climbing the staircase and destroying/avoiding the goombas on it, the player will reach the flag. The level will be cleared.