Welcome to the “WP Plugin Demos” demo site…
To run the demo, login here (with the usernames and passwords described on the login screen).
This site has only one page (the “About” page that you’re looking at now).
This is because “WP Plugin Demos” doesn’t have much to do with a web site’s front-end. It’s a back-end plugin (that allows plugin developers to quickly create demos of their plugins – where those demos run in a very simple WordPress back-end).