World 8-7 (New Super Mario Bros.)
From the Super Mario Wiki
The level begins with the player needing to clear a gap, with two Koopa Paratroopas hovering in between. After a few more gaps and Paratroopas, the player will come across a Sledge Bro. on top of breakable blocks. Past the Sledge Bro. is a section full of thin ledges that the player must balance on, with several coins available for the player to obtain. After the section with thin ledges is passed, the level's midway point is reached.
After the midway point, a pair of Fire Bros. will try to attack the player. Within a ? Block that one of them is standing on is a Starman, which can be used to score multiple 1-UPs from the Koopa Troopas in the next area. This area contains vertically- and horizontally-moving platforms, one of which is patrolled by a Boomerang Bro. Past the Boomerang Bro is solid ground, with a Sledge Bro. in the area.
After getting past the Sledge Bro. and another Boomerang Bro., the player will come across a Red Ring and a Pipe Cannon; the latter takes the player to the flagpole on a path of coins created by the former. Some Paratroopas are available to give the player a potential boost to the top of the flagpole.