Algodoo

This is the same gear clock, but this one has an alarm.

To use the alarm:
Press the up arrow key to toggle the alarm switch on and off.
Press the down arrow key to set the alarm time. NOTE: You can only set the alarm time in 1 direction.
Once the RED hour hand is pointing in the same direction as the BLACK alarm time hand, the alarm will go, as long as the alarm is switched on.
To set the time:
Set the time by using the left and right arrow keys.