Super Mario Bros. 3/World 2

This is the Desert World. The levels are somewhat more complicated and there is a secret part at the end of the map.

2-1
This level introduces Micro-Goombas (Goombas disguised as bricks that can leap.) They can be killed by stomping on them. It also introduces a Fire Snake, which can be killed with a tail or Starman.

2-2
In this level, you can get to the White Mushroom House to get an anchor if you get at least 30 coins.

Fortress
You can start by killing 3 Dry Bones. Raccoon Mario can practice getting 1-Ups by stomping them repeatedly. This level introduces 2 new kinds of enemies, Thwomps and Boo Diddlies, which cannot be killed in any standard way.

2-3
This level features Fire Snakes and Micro-Goombas. At the end, you must use the Troopa shell to break the bricks needed to get to the pipe that leads to the Goal Panel.

Desert
This level features a new enemy; the Sun! The Sun can be killed either with a Troopa shell or by waiting until the end and getting the card.

2-4
This level has 2 routes. The upper one can be gotten to with Raccoon Mario only. He must break bricks near the upper left to get there.

2-5
This level introduces Chain Chomps. Use a Troopa Shell to get a Vine in the middle of the game, and climbing it will take you to a secret room with bricks that can turn into coins with a P-switch.

Pyramid
This level starts by entering a door (you don't have the option of passing it.) It has walls of bricks that you must either use a Raccoon tail or a Buzzy shell. At the end, just after exiting via a pipe, there is a Boomerang Brother.

Secret section
One of the Boomerang Brothers will give you a music box, which will put the other to sleep. The other, however, will give you a hammer, which you can use to get to the upper right corner and break a rock. After breaking the rock, you can get access to a Toad's House with a Frog Suit, as well as Fire Brothers, which will give you the third and final whistle!

Airship
This green airship has the same enemies as the previous one, plus Rocky Wrenches. At the end, enter the pipe and stomp on Morton Koopa 3 times and you'll get his wand and receive a message from the Princess and a Jugem Cloud.