Game Development Reference
Go to the Logic Editor window, and add a new Sensor called Collision . Select And
as the value for Controller , and select Property as the value for the Actuator that
is called. Connect them and enter the values menioned next:
The Actuator property has three opions. Choose Add in Moion , because you
want to change the value of the whale life. Select the exact property that you want
to change in the drop-down menu, in this case, lifeP . At last, enter the value to
decrease, for example -25 .