June 7, 2021
I understand your frustration but as I described on the marketplace description:
"This Add-on is designed for escenarios where Google Slides is used for games or facilitation activities where several users works on the same document. This Add-on is NOT designed to be use on presentation mode."
It is not designed to be use on presentation mode. Even if I wanted the timer to work on presentation mode, Google Slides it is designed to not reflect changes on your slides when you are presenting, so, it not possible to do that from an Add-on. I'm sorry, but you are reviewing the Add-on for something that it is not designed to do. If you need a timer that works on presentation mode I recommend you to check the Chrome Extensions Store.
Virtual Facilitation Add-on