I've always heard of this as Easylang https://easylang.online/
Is it just a re-branding as Tiki?
Anyway, the author does AoC every year in it: https://easylang.online/aoc/ which I admit I have referenced during my own attempts.
>Is it just a re-branding as Tiki?
Looks like it. The source link at the bottom of the page goes to https://github.com/chkas/easylang
Found this comment from the author: "tiki.li is a test variant of easylang.online"