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 Blaster 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.