World 5-4 (New Super Mario Bros. Wii)
From the Super Mario Wiki, the Mario encyclopedia
The level starts in a area with Goombas falling from above, and four Hidden Blocks, one containing a Super Mushroom. The player must enter a Warp Pipe, which leads to a Limited Lift that is used to cross poison. A ? Block containing an Ice Flower is to the left of the exit Pipe. Enemies including Goombas, Mini Goombas, Koopa Troopas, Bob-ombs, Piranha Plants, and Big Piranha Plants land on the Limited Lift, causing the numbers on the Limited Lift to increase from 0 up to 5, which causes it to turn red and stop moving. To make the Limited Lift start moving again, the player has to defeat enemies so that there are less than five. Later, a POW Block can be found and used to defeat the enemies on the Limited Lift. At the end of the area, a Warp Pipe leads the player to the area containing the flagpole.