Pause and Resume Movie Without Continuing the Slide - System Variables?

Good afternoon, all; 

I have a slide with (slide) audio and a button on it that, in a perfect world, would allow the user to pause the slide and resume as needed. At the end of the audio the user is meant to click a click box to advance the project. At first, we tried to use the following simple advance action: 

It works to pause and play the slide but the continue command in this advanced action seems to 'override' the pause on the click box. So if the user just pauses and then clicks play (once, twice, thrice, whatever), the project advances to the next slide, completely ignoring the pause on the click box. Here is the timeline: 

After being inspired by this blog post by our resident forum expert Lilybiri, I thought that, somehow, the system variables with pause and resume might be a solution (rather than commands of pause and continue) (though the advanced action in the blog shows a 'continue', which I think is the reason for my original problem). I don't have much experience working with the system variables, though, and I have gotten confused I think. Below was my best yet unsuccessful effort 😂💔: 

It didn't work at all 😕😕. I tried a few other combinations and managed once to the get the slide to stop but the button wouldn't change state and I couldn't restart the slide/audio 🙄. It's been a challenging afternoon, so I thought at this point I'd just come and ask if anyone has any ideas of how I can do this or if it's even possible. TIA!

samamara