

It is a grassland-themed world with enemies such as Goombas, Koopa Troopas, and Cheep-Cheeps. World 1 is the first world in New Super Mario Bros. The first world in a game should be easy, right? Wrong! Mario's first stop in his latest adventure is filled with danger and will take him over land, through sewers, and underwater before he reaches his goal.” - Official website After Bowser is defeated, he falls into the lava and becomes Dry Bowser, and is not seen again until World 8.“Ah, good ol' World 1. Mario must either go around Bowser and hit the switch, which collapses the bridge, or defeat him with fireballs. The fight is very similar to the ones from Super Mario Bros., as the fight takes place on a small bridge above a pit of lava, with a skull switch (which replaces the axe from Super Mario Bros.) at one end. The boss door at the end of the area leads to Bowser, the boss of the first world. Before making it to the boss's door, Mario can jump on the last tightrope to find a hidden Warp Pipe to get to a room with the final Star Coin. The second Star Coin can be found on a moving platform that sinks into lava.

Mario then must get through a second lava-filled area. The first Star Coin can be found in one of the gaps, and Mario must Wall Jump to reach it. Mario must wait in the gaps between the spiked ceilings to avoid getting crushed. Eventually, Mario comes to a ground platform found below a ceiling of spikes that slowly moves up and down. There are also several platforms that move up and down, some of which sink into the lava. Along the way, Mario encounters Lava Bubbles and Dry Bones. The majority of the level consists of walking on tightropes over lava.
