World 2-A (New Super Mario Bros. 2)
From the Super Mario Wiki
Moving platforms which follow tracks make up most of the level which Mario must use to cross the large abyss. Platforms before the checkpoint fall into the abyss after riding on them while platforms after the checkpoint cross onto different tracks. The main power up here is the Super Leaf, which can be found in one of the first ? Blocks and ? Blocks after the checkpoint. A Coin Roulette Block can be found in the beginning of the level. Enemies found here include Koopa Troopas (some walk about on the moving platforms), Paratroopas which block the player's path when jumping from platform to platform and Fuzzies found in the second half of the level.