The DEMO version only includes 4 pages:
http://onaka-restaurant.com
http://onaka-restaurant.com/results_rid-357959-fullscreen-1_ext_iframe.html
http://onaka-restaurant.com/onaka.html
http://onaka-restaurant.com/cartes.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