I'm late to the party but I've started playing Adventure.Land and I think the players before me missed the potential here.
The premise is that you are intended to be "botting" up to 4 characters at a time who are programmed in-app with JavaScript. It's not the *very* latest ECMA standard but you at least get classes (without inheritance).
So many only saw powergaming where I saw a roleplay platform for me to run a small stable of NPCs.