If your using Google Slides or PowerPoint Online, then download the file then convert it to PPSX orPPSM online. That might work.
Not sure how it works for other programs, but in the"transition" tab you should be able to remove "Mouse click to advance" for PowerPoint.
In Google slides it's gonna take some extra work. You have to add a shape that covers the background and link it to it's current page. this stops it from moving forward.