Click as close as possible to the center. New shape, size and position after every click.
Each click is scored by how close you were to the center of the target. You have 30 seconds. After every click, the target changes.
Press Start. Then click near the center of the target as fast as you can.
No. You can click anywhere in the box. The score depends on how close your click was to the target center.
Changing size and position prevents autopilot clicking and makes the task depend on rapid aiming and correction.