Hey Mal,
Turns out it only works once for some reason. I noticed it when I started revisiting scenes I had previously viewed. It seems once a scene used the custom back button if you return to that scene it will not work again for that scene again? But you can jump from scene back to menu and see another scene for all four choices, but if you revisit any scene the button will no longer work for any scene? (i added an alert and it doesn’t even trigger if you revisit a scene?
https://www.8thwall.com/rcaf/100years/files/app.js
When I look at in google inspector I see it only gets a javascript function the first time into any scene, but on return visit the button has no attached function… The mystery continues…