THE MARBLE VAULT · A RIGID-BODY PUZZLE

Amber Key

A narrow door. A long key. Room to turn.

Fit the amber key inside the dotted socket.

Move with arrow keys or the four buttons. Turn with Q / E or ↶ / ↷. Walls block the entire key, including its corners. You can also drag it carefully.

Clearance notes

Think about the space swept by the ends of the key. A passage wide enough for its short side may not allow it to turn. Find a roomy pocket, align first, then pass through. The white notch shows which end must face the socket’s notch.

There is no timer. Bumps are feedback, not a game-over. Reset and undo let you experiment. Twelve chambers change the gates, key length, entry and socket direction.