New Super Luigi U: Peach's Castle-2 -- Magmaw River Cruise

This level features the raft that only allows a certain amount of enemies on board before it stops. There's a miasma rolling in, so you have to keep the raft moving. Dodge the Blaaargs in the lava and get the first Star Coin on the left ledge. The second Star Coin is over the lava, so use a shell to get it. The third Star Coin is with a Fire Bro. At the end of the ride, there are expanding blocks as well as a Fire Bro on the path to the flag.