Super Mario 3D Land: S8-4

We need 260 Star Coins to unlock this level. We have 30 seconds to start. The item block gives us a Boomerang Flower. We take a cylindrical grate down the lava. The first Star Coin is on the right end of the nut and bolt. We warp using the orange Mystery Box. We get a Boomerang Flower from Red Coins. We take another cylindrical grate and get the second Star Coin using a boomerang. On the rotating cylinder, we need to use a boomerang at the end to reach the third Star Coin on the right. We warp inside the cylinder to a clock and the flagpole and get a 1-up.