Super Mario 3D Land: S7-2 -- Step to the Beep Part 4

Great. Another one of these levels, and Cosmic Mario shows up. Thankfully, the platforms don't immediately disappear when another one appears. The first Star Coin is over a long item block. We go through a door and get a Statue Leaf from Red Coins. Outside are firebars. The second Star Coin is past the firebars in the corner. Wall-jump to get it. The third Star Coin is nearby over a swinging spike. The brick block past it has a Starman, so we get a break from Cosmic Mario.