[PowerPoint] Retain previous state of slides when revisiting

Perhaps I'm coming at this problem from the wrong angle and just not finding how this works, but a bit of background. I downloaded a game for Powerpoint where the main slide will have boxes that you can click on. When clicked, you will be taken to a new slide with a quiz question. Once the question is answered, you can click a back botton and it will return to the main slide and the box you clicked on in the main slide will perform an animation and disappear. The boxes that you clicked on will remain gone each time you return to the main slide untill all of the boxes are gone. When looking at all of the slides, there is only one main menu slide. It seems to somehow be saving the last state of the slide for when you return to it, but I can't seem to figure out how it's being done. Any idea how this works? I'm using Office 2019 for reference. Thanks