World 4-5 (New Super Mario Bros.)

World 4-5 is the seventh level of World 4. It can be unlocked by clearing

Layout
This is an underground level with Bob-ombs. Some bricks can only be destroyed by blowing up a Bob-omb. This is needed for Mario to get past some areas. This skill is also used to get the first Star Coin. To get the second Star Coin, the player must wait until a drawbridge goes up. Next, he must hit the Bob-omb above him, destroying some blocks, allowing him to get the coin. After a few more drawbridges, the player should notice one that has a pipe with blocks covering it. If Mario blows up a Bob-omb, he can go inside it and, by breaking more blocks with Bob-ombs, he can get the last Star Coin. Leaving the Warp Pipe is the Flagpole.

Star Coins

 * Star Coin 1 - The Bob-omb can be placed near the side of the box to remove it and reveal the first Star Coin.
 * Star Coin 2 - When the drawbridge goes up, a Bob-omb can be detonated and the Star Coin can be collected.
 * Star Coin 3 - A Bob-omb can be used to clear a pipe. Inside, 5 Bob-ombs are available to destroy the blocks so Mario can grab the Star Coin.

Enemies

 * Koopa Troopa
 * Spiny
 * Bob-omb