This level is famous for its hidden blocks and another Warp Zone. Near the beginning, after the first few '?' blocks, you'll see a long row of brick blocks. Jump on the fifth brick block from the left (it's above a pipe) to reveal a Vine. Climb the Vine to reach a secret cloud area with many coins and a Warp Zone. The pipes in the Warp Zone lead to World 6, 7, and 8. This is a significant shortcut! If you miss the Warp Zone, continue through the level, which features more Goombas and Koopa Troopas. There's also a hidden Starman in a block near the end, just before the flagpole, if you choose the normal path.
