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.

If you're Raccoon Mario, you can fly up to reveal a pipe that contains a P-switch and some coins that will appear after hitting the P-switch.

2-2
In this level, you can get to the White Mushroom House to get an anchor if you get at least 30 coins. In the second half of the route, try not to break any bricks that can turn into coins with the P-switch.

(Variant: In Super Mario All-Stars, 3 extra coins were added so that it can be possible to get the White Musroom House without getting the 4 coins far away from the P-switch.)

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. In the third room, there are Spiked teeth that rise and fall. You can run below them as long as you don't get hit, or you can jump on top of some safe ones. The final room is Boom Boom's room.

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. At the end of the level, a Boomerang Brother appears below the cards.

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.

In the middle is a pipe leading to a room containing coins and a 1-Up. At the end, just after exiting via a pipe (not below the cards unlike a few earlier levels,) 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
The king has been transformed into a spider. 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 or pelt him with fireballs and you'll get his wand and receive a message from the Princess and a Jugem Cloud.