World 1 (Super Mario Bros. 2)

World 1 is the first world Mario, Luigi, Peach, and Toad venture through in Super Mario Bros. 2. It is divided into three levels and inhabited by Tweeters, Shy Guys, Snifits, and Pidgits. At the ends of the first two levels, the heroes have to face the egg-spitting Birdo, and Mouser at the end of the last level. It tends to have waterfalls with log bridges.

World 1-1
World 1 starts with the character (the player chooses) dropping down from a doorway suspended in mid air. At the bottom of the screen, there is another doorway, which leads outside. There is an extra 1-Up disguised as a plant next to a POW on top of a hill. There is a shortcut to Birdo that can be found in the cave area halfway through the level. After climbing up the vine, instead of exiting to the right to the normal exit, jump across the waterfall and use bombs to blow up blocks. After going through the door on the other side, proceed to the right and Super Jump over the wall on the right side of the screen, where Birdo is faced in.

World 1-2
At the start of the level is a Magic Carpet that needs to be hijacked in order to get across the large pit. Afterwards there are two vases - the first has a 1-UP at the bottom, and the second has a key for opening the locked door. Beezos will try to knock player off the Magic Carpet in this level. Inside the cave, the player have to crumble walls. When leaving the cave, there are a lot of veggies. After the player goes through the door, they will find a pink Birdo that spits only eggs.

World 1-3
This level features a hidden warp to World 4. Right before the castle, there will be a cluster of plants, one of which is a magic potion. Take the magic potion past to the far right of the screen, past the castle, to a vase. Use the magic potion to create a door, enter the door, enter the vase while still in dream land, and the player will be warped to World 4.

For the normal exit which will lead to World 2, enter the castle as normal and at the end to face Mouser.

World 1-1

 * The first one is near the Magic Potion on the hill.
 * The second one is above the logs on the second waterfall.
 * The third one is in the cave that the player get in through the door.
 * This one is located on the cloud with the Shy Guy just before getting to the vines.
 * The last coin is on the left of the fist 3 vines.

World 1-2

 * The first one is under the level when the player gets on the Magic Carpet.
 * The next one is at the top somewhat directly under the first one.
 * The third one is in a cave, a Key is needed to open it.
 * This coin is seen when getting out of the cave and going left.
 * This coin is seen by the last door.

World 1-3

 * The first coin is right above the place the player starts.
 * The second coin is above the 2 logs after the 2 big waterfalls.
 * The third coin is above the first vase the player can't go down.
 * The fourth coin is right before the locked door.
 * The last coin is in side the locked door on the third section.

World 1-1

 * The first egg is at the bottom of the vine that the player has to climb up to get the magic potion.
 * The second egg is on the hill right across from the cloud above the cloud with the vase that has the magic potion.

World 1-2

 * The first egg is right behind the first wall that can crumble.
 * The second egg is to the right of the second vase. It can also be found before the first egg.

World 1-3

 * The first egg is under the bridge.
 * The second egg is on the middle of the three platforms with the sparks. To get the magic potion the player have to go down the vase.

Trivia

 * In the GBA Version, World 1-1 got the most changes of all the levels in World 1.