Here’s the game, click the gear icon on the right to activate the overlay menu:
http://www.rickvanhelden.com/blackhole/
The overlay is a Container that’s placed in the Scene. Inside the container is a Graphics gameobject that covers the entire screen.
I’ve added this.input.setGlobalTopOnly(true) to the create() function of the scene but pointerover and pointerdown events are still coming through as you can see.