Hacker News Reader

A small scale version of Myst. (Is there something like a Myst generator? A personalized version of google map?)

You could always use the original Myst generator, HyperCard.

If you target Mac OS 9, that is.

Theres a cross-platform "HyperCard" called LiveCode (https://livecode.com/). The syntax is very similar and you can even import old HyperCard programs: https://www.hyperactivesw.com/mctutorial/rrtutorialtoc.html

There's a bunch of 'virtual walk through' services like Matterport, seems like real estate people use them a lot.