New Super Luigi U: Rock-Candy Mines-4 -- Light-Up Lift Tower

This is a dark level filled with giant Light Blocks you can use as platforms. There are Fire Snakes here, so be careful. Step on the Light Blocks to get them to start moving. Once they start moving, the level automatically scrolls up. The first Star Coin is on the right side, blocked by Light Blocks that move away eventually. Get the Star Coin and quickly return to the moving Light Blocks. The second Star Coin is on the right wall. Higher up, you'll find Fire Piranhas. About halfway up is a P-Switch that makes Silver Coins appear. The third Star Coin is at the top of the level, in the left corner, guarded by giant Fire Piranhas. Use a Fire Flower to kill them, then wall jump to reach the Star Coin. The pipe nearby takes you to the flagpole.