Each round shows a circle of the world centred on a random place, turned to a random angle. Drag the map (or use the arrow keys, the buttons, or your scroll wheel) until the top of the map is north, then lock it in.

You score up to 100 points per round: 100 for being within 2°, falling to 0 at 90° off. There are 10 rounds.

After each guess the map spins back to true north and shows where you were. The orange marker on the ring shows where your north ended up.