World 5-7 (Super Mario Bros. 3)
From the Super Mario Wiki
This level is composed of several Brick Blocks, with some Pile Driver Micro-Goombas hiding between them. The player starts the level near a green Koopa Troopa, as well as some Brick Blocks and ? Blocks with coins. After this there is a Pile Driver Micro-Goomba on top of a Hard Block containing a power-up, a big structure made of Brick Blocks with more Pile Driver Micro-Goombas and a Fire Piranha Plant whose pipe leads to a secret area. Shortly afterwards, a Lakitu appears, as well as some Bill Blasters and more Pile Driver Micro-Goombas, followed by a Warp Pipe that takes the player to the goal.