World 5-4 (New Super Mario Bros. Wii)

This level has Mario traveling across the toxic liquid on a wooden plank. Creatures including Piranha Plants, Goombas, Koopa Troopas and Bob-ombs and even coins will land on it, causing the numbers on the plank to increase from 0 up until 5 at which it turns red and stops. To make the plank start again, the player has to remove enemies off of the plank so that there are less than five.

The first Star Coin is near the beginning of the level, on an area full of Koopas. The second one is close to the ending, in an area full of Piranha Plants. It is hiding in the clouds and can be obtained by using a POW Block. The last one is just before the pipe that takes the player to the goal. It is between some blocks that can be blown up with a Bob-omb.