Click on Image to call Action
Any Game Object can have events associated with it.
For example, let's set up a "Close Image". When you click it, the game must stop.
Add an Image to your game and select a suitable "close" icon.
The image should look something like this:
(Remember to Move the image to the top of the list so that it appears above other objects)
Add a Pointer Event
Edit the Pointer Event and select the object to associate with this event (in this case close_image).
Also select the required pointer event that will trigger this action (e.g. on_pointerdown)
Type in the required command:
When you click the Close Image, the game will stop.