Press the green flag to start the clock. Press the red stop sign to stop the clock. Simply activate and enjoy! Press the up key, or scroll up to zoom into the face of the grandfather clock. Press the down key, or scroll down to zoom back out of the grandfather clock. Click on the wooden panel to reveal the pendulum and weights! To silent / unsilent the ticking sound, click on the second hand. If the pendulum gets stuck (stops moving smoothly, or at all), simply click on it until it runs smoothly. Press the [1] key to test the hour bell.