World 2-4 (New Super Mario Bros. 2)
From the Super Mario Wiki
World 2-4 is the fourth normal level of World 2 in New Super Mario Bros. 2. It is a level filled with Pokeys, Spinies, and Fire Snakes. It also has many blocks that stack up to form pyramid-like structures.
This relatively short level is made up of walls which act as platforms. The level begins with Mario on top of one of them, where he meets a Goomba. A red Koopa Troopa appears with a Roulette Block located on another wall. The player needs to climb up the wall structures in the level. Several ? Blocks, a Red Ring and enemies such as Goombas and Fire Snakes can be found. This is followed by a Pokey, a ? Block and the Checkpoint Flag. A ? Block containing a Fire Flower can then be found. Spinies and Pokeys then begin to appear more frequently. The player needs to climb up another wall structure to the top, where a long, narrow hole with many coins can be found. Dropping down the hole leads to a yellow Warp Pipe, leading to the final area. A Pokey can be found between the yellow platforms and finally the Goal Pole can be found.
To the right of the Roulette Block, the player can break a Brick Block to access a small area with a ? Block containing a Super Star. After obtaining it, if every other ? Block in the level is hit as Invincible Mario, more Stars will be released rather than Coins until the invincibility wears off.
Before the second Star Coin, there is a yellow pipe. The player must go down and they see two pipes that spawn Goombas. The Goombas can be jumped on to receive 1-Ups. A Gold Ring or a Gold Flower can also be used to obtain 1-Ups.