Creepcrack Castle, or World 1-Castle, is the tenth course, and castle, of Yoshi's Island. It takes place in a dark, abandoned castle.
- Star Coin #1: Take the bottom fork at the beginning of the level, and cross the spiked walls carefully to get it.
- Star Coin #2: After the first Thwomps, take the top fork to reach the Star Coin.
- Star Coin #3: To the right of the inaccessible Star Coin, hit two invisible blocks to a red warp pipe. Upon entering, hit the ?-Switch and hurry quickly through the corridor to a gap to fall through and follow to get the Star Coin.
- Spiked Ball
- Piranha Plant
- Big Piranha Plant
- Fire Piranha Plant
- Boss: Giga Fuzzy