World 8-2 (Super Mario Bros.: The Lost Levels)
From the Super Mario Wiki
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World 8-2 is the second level of World 8 in Super Mario Bros.: The Lost Levels. The fortress walls in the background appear in the original and Super Mario Bros. Deluxe versions of the game with items being found in Brick Blocks, but the walls are absent in the Super Mario All-Stars version, with items being found in Hidden Blocks.
The player begins on a stretch of land ending at a pipe with a Piranha Plant. Above the gap afterward is a platform that falls when the player jumps onto it, and above that is a Brick Block containing a power-up. Afterward is a row of Koopa Troopas, Buzzy Beetles, a Koopa Paratroopa, and Piranha Plants ending at a Springboard. Using the Springboard, the player can get over a tall pillar and jump across a pool of water. To progress further, the player needs to jump off of a Koopa Paratroopa and hit the Brick Block above it, producing a Beanstalk that leads to the Goal Pole. If the player defeats the Koopa Paratroopa without hitting the block, or misses the block entirely, they will have to continue to the right through some Hammer Bros., blocks with Poison Mushrooms, and an underground chamber to return to a Warp Pipe before the Springboard and try again.