World 5-A (New Super Mario Bros.)

World 5-A is the first bonus level of World 5, in New Super Mario Bros. It can be unlocked by spending five Star Coins.

Layout
This level has Mushroom Platforms that shrink and expand. Mario must time his jumps, because not all of the platforms move at the same time as each other. After the checkpoint, Mario can get the first Star Coin by going down to a Mushroom Platform. He needs to hit a ! Switch to return. Just after that, Mario should find a single block. If he hits it by running and jumping, a Beanstalk pops out, taking him to an area with the second Star Coin. The player should later see two Mushroom Platforms that are able to touch each other. Mario should stand in between them and jump when they shrink, getting the last Star Coin. Then, Mario reaches the Goal Pole.

Star Coins

 * Star Coin 1 - Mario should go to the Mushroom Platform near the red ! Switch. After it expands, he can quickly grab the first Star Coin located to the right.
 * Star Coin 2 - After hitting the block by either running and jumping or with a Koopa Troopa shell, Mario can climb the beanstalk and collect the second Star Coin.
 * Star Coin 3 - Right after the mushrooms shrink, Mario should land on the platform to get the final Star Coin.

Enemies

 * Koopa Troopa