World 2-1 (New Super Mario Bros. 2)
From the Super Mario Wiki
World 2-1 is the first level of World 2 in New Super Mario Bros. 2. It is a sandy level filled with many moving Brick Block platforms and grounded Piranha Plants. This level is also the first appearance of the Gold Flower.
First, Mario comes across some tilting Brick Blocks, one of them is a ? Block containing a Fire Flower, followed by a Piranha Plant. Throughout the level, there are tilting Brick Blocks which acts as platforms, and Piranha Plants being the main enemies. There is also a Red Ring which will make eight Red Coins parachute into the level. After the Checkpoint Flag, there are also Note Blocks, Koopa Troopas and Koopa Paratroopas. After the last Piranha Plant, several tilting Brick Block platforms can help Mario reach the top of the Goal Pole.
The three Star Coins in this level are located very close to each other.