The DEMO version only includes 4 pages:
http://atom.com
http://atom.com/embed/239474/56ce9a6f-11f5-4b37-8332-cef869c5f179_autoplay-false-loop-false-muted-false-preload-true-responsive-true_ext_iframe.html
http://atom.com/blog/discover-atom.html
http://atom.com/views/dashboard/index.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