World 6-B (New Super Mario Bros.)

World 6-B is the second and last secret level in World 6 in New Super Mario Bros.

Layout
This is an icy mountain level. To start, Mario must enter the Warp Pipe on the far right, blasting him to the top of the icy platform. Next, the player needs to grab several Ropes, some moving, and swing to the next few platforms. At the first Star Coin, Mario must grab a Shell, throwing it at the coin. Soon after that, the player should be at an area with tipping purple mushrooms. When Mario blasts out of the next Warp Pipe, he should bounce off the Paratroopa to get the second Star Coin. The next area contains Piranha Plants and more purple mushrooms. The player should later see three Warp Pipes, which all blast Mario to the same area, but at a different angle. When the player sees more ropes, they must swing to the top platform and slide while ducking to reach the last Star Coin. Lastly, the player must make several jumps across the pipes to reach the Goal Pole.

Star Coins

 * Star Coin 1: After some of the first ropes, Mario must grab a shell and toss it at the coin.
 * Star Coin 2: After the second Cannon Pipe, bounce off the Paratroopa.
 * Star Coin 3: After three Warp Pipes, swing to the top platform using the rope and slide while ducking.