Super Mario Bros. 3/World 1

This is the Plains World. The levels are pretty straightforward and should not pose too much of a difficulty. Interestingly enough, you can beat 4 levels and make it to the final World right from the first World.

1-1
There are two pipes at the very end of the level. If you have the tail, you can fly to the top of the top pipe to access a secret room with a big "3" spelled out in coins.

Collecting over 50 coins in this level unlocks the ghost coin ship.

1-2
Early in this level, there is a pipe with Goombas coming out of it. Raccoon Mario can touch 9 or more of them without touching the ground and get 1-ups. There is a 1-up on top of the pipe in the middle of the level that takes you to the secret room. To get it, jump up on the pipe. The secret 1-up block is above the pipe on the right side.

1-3
In the middle of the mass of blocks in the middle of the level is a secret pink music block that takes you to a coin heaven.

One of the warp whistles is obtained in this level. Near the end of the level there are 5 blocks with a white block in the center. Crouch on the block for about 4 seconds and you will go behind the level obstacles. Run behind the finishing screen to access a secret item mushroom. Take the only object in the room to get a warp whistle.

1-4
This is a side-scrolling level where you have to get at least 44 coins to get a White Mushroom House. Note that it is hard to get a star in this level because of the short distance between the Pipe and the Goal Panel.

Fortress
One of the warp whistles is obtained in this level. To get this you have to have a flying leaf. At the far right there is a door, an item box, and a boney turtle enemy. Knock out the turtle and run to the far right of the level. Maintaining your P-meter, run to the left. If you have a full P-meter, take off and fly to the left of the wall and fly right until you start moving right. Go all the way to the right and enter a secret door to be transported to a room in the fortress with an chest. The chest contains the warp whistle.

1-5
This is an underground level. You begin by sliding down and killing 4 Buzzies. After a while, there is a pink block similar to that in 1-3.

1-6
Raccoon Mario can fly over and get coins just about halfway through the level.

Airship
This is the first Airship. It has Bullet Bills and Cannonballs. Follow it and enter the pipe at the end and kill Larry Koopa by stomping on him 3 times. You will get his wand and change the king back, and receive a message from Princess Toadstool.