World Coin-4 (New Super Mario Bros. Wii)

 is the fourth level of Coin Courses in New Super Mario Bros. Wii.

Layout
This is a desert-based level that takes place underground. The whole level is completed using a moving platform. There are many Sand Geysers that the player can jump on. The primary enemies are Koopa Troopas and Paratroopas. Propeller Mushrooms are the power-up encountered here.

Star Coins

 * Star Coin 1: At the beginning of the level, over some Dash Coins.
 * Star Coin 2: Halfway through the level, at the top of Dash Coins and brown platforms.
 * Star Coin 3: Suspended in midair. A Koopa Shell or Propeller Suit is recommended.