1-5: Dig through the dirt and break the sticks, smashing the purple blob. Dig through the next set of sticks to drop the boulders and kill the blob if it is still alive. Pick up the silver key.
6-10: Break open the door and kill the red blob. Break down the wall to retrieve the bronze key, then break the stone.
11-13: Avoid the poison arrows and pick up the gold key. Use your bronze key to open the bronze door and kill the red rat.
14-15: Use your silver key to open the silver door. Use your gold key to open the treasure!
(Uses 16 energy)