World 5-3 (New Super Mario Bros. Wii)
From the Super Mario Wiki
World 5-3 is a forest level in New Super Mario Bros. Wii takes place on a few logs over poison. The level is the only level where Bramballs appear. The player needs to avoid them without falling off logs or they will land into the toxic goop.
Mario begins the level near a Bramball. A ? Block that contains a power-up can be found soon after, along with another Bramball. After a few more Bramballs and pits filled with poison, a Warp Pipe that takes Mario underground can be found. Some coins and a Roulette Block can be found through the pipe. After the pipe, some logs can be found floating in the poison. Mario must continue to jump while on the logs to avoid falling off. After some logs that have Bramballs over them, the midway point and four ? Blocks can be found.
After the midway point, two Bramballs can be found near a Pipe Cannon. The Pipe Cannon will launch Mario onto a platform, where a Warp Pipe that leads to a Coin Heaven can be found. A Red Ring and a Propeller Block can be found in the Coin Heaven. After the Pipe Cannon, some ? Blocks and another log can be found. Four tall platforms can be found in the poison after the log. Two quick Bramballs can then be found, along with a Warp Pipe. Through the pipe, a Bramball and the flagpole can be found.