New Super Luigi U: Frosted Glacier-5 -- Ice-Slide Express

Outside the level are a couple of blocks. Hit them to get the Penguin Suit, then take the pipe underground. This level lets you belly-slide through most of the level. The rolling hills will let you gain a little momentum. When the path splits, jump for the first Star Coin. Nearby is a Silver Ring which makes Silver Coins appear. The Silver Coin trail leads to a Red Coin Ring and the second Star Coin surrounded by brick blocks. Slide into the brick blocks to break them and get the Star Coin. Towards the end of the level, you'll slide up a large slope, then drop down the water. There are blocks of ice floating in the water under pipes with Piranha Plants. Get a running start, slide, then jump when the path splits to hit some brick blocks and break them. This will allow you to reach the third Star Coin, which is hidden in the alcove above before you reach the pipe. There's an 8-bit Luigi in the alcove. The pipe takes you to the flagpole.