Ink

Draw a loop round the filled dots.

Sixty dots, filled and hollow, and some of the labels are wrong. Drawing is free. Committing costs the length of the loop in ink, and the score you watch climb is on these dots only.

Then 400 hidden dots with the right labels judge it. Pass and the pool refills a little. Miss and you pay a fine on top. Ink is the only currency.

Nothing gets harder. The rules are the same at round 1 and round 40. You run out because of the ledger.

The loop and the dots it holds share a colour, and it warms as the pool drains.

Canvas2D, so the game is whole on any phone. No camera, no account, and nothing leaves the machine.