New Super Mario Bros.: 7-2

This is a narrow level that wraps around, so if you go off screen to the left, you'll appear on the right. Go up the pipe and get on a platform with three arrows. Stand either on the left or right sides to make the platform go in that direction as it continually ascends. To make life interesting, you'll have to contend with Parakoopas, who will walk on the platform if you stomp them once. There are narrow gaps throughout the level, and after the first one, you'll find the first Star Coin encased in brick. Break the bricks to get it. There are some Red Coins to collect before the midpoint. You'll want to stay to the right until the stairs appear, then move towards the center. Use a Koopa shell at the top of the stairs to reach the second Star Coin, so you can keep going. Towards the top, you'll find Parakoopas flanking the center of the level. The third Star Coin is over on the left side, so be careful as you try to get it. Take the pipe at the top to the goal.