New Super Mario Bros.: 6-A

This level takes place in the desert, where Lakitu flies overhead. There are tordadoes in this level, which spin you around and launch you in the air. You'll slowly descend to the ground, so pick up any coins you find in mid air. Enter the first tornado from the left side so you'll exit with enough height to reach the first Star Coin in the air. It's to the right; just follow the trail of coins. Soon after you get the first Star Coin, you'll find a patch of quicksand that's higher than the rest. Let the quicksand pull you under to a cave below. In this cave, wall jump for the second Star Coin. Go up the yellow pipe to return to the main level. Past the midpoint you'll find an item block that you can't normally access. Let the quicksand in front of it pull you partway down, then hop up after you go under the rock. It will give you a Starman to make your life easier. Towards the end, you'll find two pipes in a large gap between two large sets of pipes. Go down the yellow pipe and jump over the giant Piranha Plant for the third Star Coin. You'll come up a pipe to the left of the yellow pipe you just when through. A nearby green pipe in that cluster is a cannon that will blast you over the gap, which will trap you with invisble blocks. After that is the pipe to the flag.