Just press the green flag . Easy
This is a 3D star . You can see this star at 2 ways . At the back or at the front . If you fullscreen or zoom the star , you are suppose to see it behind ... HOW IT WORKS : As long you pay attention to the "Star " going back or front , you can pay attention to the direction too . Because this star has NO SHADOWS you have the sensation that the star is going back or forward