Use arrow keys to move around the maze. collect emeralds as much as you can. each time you collect them the warden grows bigger. If it turns in to a ghost you can touch it. the game ends when you get touched by the warden. Collect emeralds to keep the screen from turning black.
Here is a tip if the cranking sound is over when the warden turns into a ghost that means it is about to turn into the warden again. the warden can walk through walls. Thanks to Intermediate Minecraft Summer Camp.