The DEMO version only includes 4 pages:
http://fv-gagym.de
http://fv-gagym.de/ergebnisse-volleyballturnier-2019.html
http://fv-gagym.de/category/allgemein.html
http://fv-gagym.de/spendenlauf-fuer-das-gruene-klassenzimmer-mit-kulturellem-und-kulinarischem-rahmenprogramm.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.
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