The DEMO version only includes 4 pages:
http://verticalslicearchitecture.com
http://verticalslicearchitecture.com/embed/T-EwN9UqRwE_ext_iframe.html
http://verticalslicearchitecture.com/learn/overview.html
http://verticalslicearchitecture.com/learn/cookbook/history.html

It is possible to download these free files and install them on your server, so you can test how the site works.
Visit https://www.waybackmachinedownloader.com/en/buy-wayback-machine-downloader-recover/ to buy a fully functioning site.
Go back to the index page