New Super Luigi U: Layer-Cake Desert-1 -- Spike's Tumbling Desert

There are Spikes dropping spike balls, so destroy some of them to make the level easier. (You might run out of time if you try to defeat them all). The first Star Coin is over the moving brick blocks. The second Star Coin is nearby, hidden under a ledge with a Spike. Past the Red Coin Ring is a P-Switch that turns coins into brick blocks, allowing you to reach the third Star Coin. The flag is nearby. After finishing the level, Nabbit appears and steals something from Toad. He then goes to Acorn Plains-1. Luigi now gets access to the pipes between worlds.