World 4-1 (New Super Mario Bros. Wii)

World 4-1 is the first level of World 4 of New Super Mario Bros. Wii. This level introduces Big Urchins and is mostly submerged in water.

Layout
This level has two choices right from the start-platforms or water. The player can clear the level by jumping on platforms or only being in the water. This level has Urchins, Big Urchins, Cheep Cheeps, Spiny Cheep Cheeps, and other enemies like those.

Star Coins
A Penguin Suit is required for all three Star Coins.
 * Star Coin 1: The first Star Coin is floating high above the underwater Piranha Plant, which Mario and co. must freeze and use to jump up to the Star Coin.
 * Star Coin 2: Not far after the Checkpoint Flag, the second Star Coin is floating high-up in an opening, directly above an Urchin. Mario and co. must freeze the Urchin and use it to float to the surface and get within jumping reach of the Star Coin.
 * Star Coin 3: The third Star Coin is at the end of the level, atop the long sideways green Warp Pipe. Mario and co. must freeze the two final Urchins and use them as platforms to reach the Star Coin. Alternatively, Mario and co. can penguin slide across the water surface as fast as possible and jump to the Star Coin before the slide halts.

Enemies

 * Cheep Cheeps
 * Mega Cheep-Cheeps
 * Spiny Cheep Cheeps
 * Urchins
 * Big Urchins
 * Koopa Troopas
 * Koopa Paratroopas
 * Piranha Plant
 * Clampies