New Super Mario Bros.: 8-7

There are lots of Parakoopas in this level. When you reach a really tall wall you can't get over, hit the invisible block just to the left of it so you can scale the wall. Use a shell to take out the Sumo Bro,  the run under the platform for the first Star Coin, without running off the edge. Jump back up so you don't have to worry about falling. You'll come across some rock with thin ledges before the midpoint. Soon after are two Fire Bros. Be careful about approaching them from below. In one of the blocks in their area is a Starman, so that may help if you can reach it. Use it to take out Koopas in your path. The second Star Coin over a Boomerang Bro on rising platforms. Past the platforms is another Sumo Bro. He's standing on some brick blocks over the third Star Coin, so let him pound them. Take him out after he pounds the first row and get the Star Coin safely. There's another Boomerang Bro, as well as some Red Coins before the cannon to the flagpole.