I genuinely thought that's what the article was about before clicking.

Me too, especially because it was quite groundbreaking at the time with its dynamic music engine.

And I think various open source engines, reimplementations or examinations of the original have been posted a to HN a few times over the years to a lot of positive comments as people remembered the original. I assumed this was another along the same lines.

I wonder how many people upvoted this without reading, assuming it's that Loom.

I was 100% expecting to see a reimplementation of that game

You might be interested in "Forge", the open-source sequel… https://forgegame.com/ (last updated 2015, alas)

Looks sadly derelict - though I see a small uptick in visitors today no doubt due to your post.

This was exactly the reason why I never clicked faster on a HN link...

my day is ruined and my disappointment is immeasurable...