New Super Mario Bros.: 8-6

This time, we're in the volcano, and the magma's rising. This level wraps around like 7-2, which you'll need to take advantage of to progress. Go around to the left to reach a pipe cannon to a set of stairs. Quickly go up, over, and down for the first Star Coin. Take the spin spring up, then pound the bricks to the left as Super Mario to reach the 2nd Star Coin. Keep going up and you'll find Spinies walking on platforms from the original Mario Bros. game. You can bump the Spinies from below, but you can't jump through the platforms. Go to the right side for the third Star Coin, then wrap back around. Take the pipe cannon into the center out of the volcano. You won't fall back in, so don't worry. Just go to the flag. The magma's not following you.