World 7-4 (New Super Mario Bros. Wii)

This is a level very reminiscent to 7-1, except instead of moving blocks, there are moving pipes. The main feature in this level are the pipes that move up and down. Common enemies are Bullet Bills, and Piranha Plants. Banzai Bills also make an appearance here, as does the only Banzai Bill Cannon seen in New Super Mario Bros. Wii. There are also platforms that when the player hits a gray block and turns the Wii Remote left or right, the platforms will head to the direction that the Wii Remote is tilted.

Star Coins

 * Star Coin 1: The first Star Coin is floating to the top-left of the Banzai Bill Cannon directly after the Pipe that leads to the next area. Mario and co. must get on the moving Red Pipe to the right of the exit one, avoid any Banzai Bills, and jump to the Star Coin while the Pipe is at its highest point.
 * Star Coin 2: The second Star Coin is right under the top of three command platforms arranged in a column. Mario and co. has to get on the middle one, tilt it, and jump up to the top one at the right time to get the Star Coin and avoid falling.
 * Star Coin 3: At the end of the level, instead of taking the Red Pipe, Mario and co. must use the Bullet Bills to get into the Green Pipe further to the right. Once there, Mario and co. must go left and again use Bullet Bills to reach the third Star Coin on top of the tallest Bill Blaster.

Enemies

 * Koopa Troopas
 * Koopa Paratroopas
 * Piranha Plants
 * Bullet Bills
 * Bill Blasters
 * Banzai Bills
 * Banzai Bill Cannons