Thank you for replying!
When the speech bubble appears (since I put it at 100%), I have time–as much time as I want–to press a tappable choices. Only after I click does it seem t start the timer, since once I click the screen (the the tappable overlays), it goes directly to the “else” choice.
I have created and spotted all my overlays before the choice. I don’t have any error messages (other than one that says one of my overlays hasn’t been approved yet). My choices are named exactly as my overlays. Everything works except for the timer.