More puzzle fonts https://www.dcode.fr/symbols-ciphers

Orange Pi

Self hosted and open source alternative is https://directus.io/

They switch from PHP to Node recently

A nice reading about OS/2 histoty https://arstechnica.com/information-technology/2019/11/half-...

A nice open-source library to create similar games is https://www.puzzlescript.net/

OS/2 warp. A great operating system.

I think in Greece there are similar cases in small islands eg https://en.m.wikipedia.org/wiki/Lady_of_Ro

If you have never tried Gin why suggest to use something else?

The "pentakis dodecahedron" logo is by Felix Koutchinski (as said in credits/links)