The DEMO version only includes 4 pages:
http://bismarckhoehe-in-werder.de
http://bismarckhoehe-in-werder.de/index_php.html
http://bismarckhoehe-in-werder.de/seite/379486/unsere-öffnungszeiten.html
http://bismarckhoehe-in-werder.de/seite/376760/allgemeines.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