Wander is maybe the first IF-writing system. It's playable on an instance running on Amazon Web Services, and comes with 4 'databases', or game worlds, you can choose from: Aldeberan III, Castle, Library and Tut (Binary Arithmetic Tutorial). I spent some time poking around it, but found myself frequently stymied by guess-the-verb and un-clued puzzles.
Regardless, it was an interesting experience, probably best accompanied by the saga kicked off by Jason Dyer:
https://bluerenga.blog/2015/03/19/lost-mainframe-games/
The game was ultimately found:
https://ahopeful.wordpress.com/2015/04/22/wander-1974-a-lost-mainframe-game-is-found/
Jason Dyer also has a review of the 'Castle' database here:
https://bluerenga.blog/2015/12/21/castle-using-wander-system-1974/