Have a search here for the word ‘parallax’. There have been a number of examples of this technique posted here, built in Freeway. If you’re just getting started with Freeway, I would recommend that you look at one or another of the templates first, and build a more conventional site to get your feet wet. As you have seen, Freeway’s basic workflow is based around individual separate pages (with their own URL) that you build individually within a site. It works extremely well for this.
Making a sequence of “panes” on a single page that will behave like a set of related pages (the so-called one-page-application site) is definitely possible in Freeway, but it requires some special effort, and it really helps to understand what Freeway does by default before you move into this realm. Walk before you run, basically.