A guide to completing World 1-3 in Super Mario Bros 1 for the Nintendo Entertainment System.

Get All the Coins

If you want to get a hidden 1UP in World 2-1, be sure to get all of the coins in this level without dying! If you don't, the 1UP won't be there! (Technically, you can miss two coins in World 1-3 and still get the 1UP.)

Explore World 1-3

Go to the right and jump onto the tree, then go to the right and jump up to the next tree. You can't jump up through the leaves above you, so you need to jump up from the side. Be careful of the red Koopa Troopa. When it reaches the edge of its platform, it will turn around and go the other way. It won't fall off like a green Koopa Troopa would.

If you're Fire Mario, press B to hit the Koopa Troopa with a fireball, or just jump onto its tree when it's out of the way, and stomp on it and kick its shell away. Collect the coins on top of the tree where the Koopa Troopa was.

You can go down to the right where there is a single coin on a small tree, but be careful of the Goombas that fall from above on the right. Get the two coins to the left of the tree that the Goombas were on, and get on top of that that tree.

Try to fall through the two coins to the right. If you miss, you can get on the moving platform on the right to try to jump through the coin(s) you missed. Then, to the right of the moving platform, you can hit the ?-mark block to get a Mushroom or Flower.

Use the moving platform to reach the top of the tree and get the coins there. Then make your way to the right, where there is a flying Koopa Paratroopa. Wait for it to be at the high point of its flight path, then jump on it to reach the tree to the right. When you jump on it, it will lose its wings and turn into a normal Koopa Troopa.

Get rid of the Goomba on this tree if it's still there, then go to the right. Wait for the nearest platform to be close enough to jump on, and jump on it. You'll go through the coins when the platform moves to the right. Then jump right to get onto the next moving platform. Get the two pairs of coins above it, then you can either land on the lower tree and wait until you can see the red Koopa Troopa on it, or you can try to make a running jump from the moving platform. Be careful not to bump into the Koopa Troopa.

You can hit the Koopa Paratroopa with a fireball if you're Fire Mario, or just jump on it to make it lose its wings, then try to stomp on it when it lands on the small tree below with the three coins.

Keep going to the right, and get the two coins between the two trees. To the right, there is a platform moving side to side, with a red Koopa Troopa below. If you fall down below, you can make a running jump to the right. Otherwise, use the moving platform to reach the blocks on the right. From the top of the blocks, run and jump onto the goal pole on the right. Then you'll continue on to World 1-4.