I like how so much of this is interactable and has so many game like properties. Makes exploring the website and all the information actually enjoyable and intriguing.
Lots to dig in to here — thanks for posting. Internet Archive says the site has been around since ~2010, which is a likely indicator that its current iteration is handmade :)
The best adventure games are 2D because random walks there always return (Pólya). Not true in 3D, so puzzle games there end up either too easy or too difficult.
With an infinite expected return time...