Oh I found it. It's learn-anything.xyz. Source: about 1 year ago

I think I found something that looks and works like what you described: https://learn-anything.xyz/. If it's not that one then I'd also like to know what it is because it sounds really useful haha. Source: about 1 year ago

This one is my favourite, its not great for everything but most of the time it provides a solid road map to learning something new. https://learn-anything.xyz/. - Source: Hacker News / over 1 year ago

Learn Anything : Community curated knowledge graph of best paths for learning anything. - Source: dev.to / over 1 year ago

You may be thinking of https://learn-anything.xyz/. - Source: Hacker News / over 1 year ago

I love these kinds of sandbox games, Orb Farm was super nice to have it running directly in the browser for a little procrastination break. Although my favorite is probably The Powder Toy [0], I've been following this project for years. [0] https://powdertoy.co.uk/. - Source: Hacker News / about 1 year ago

I play The Powder Toy https://powdertoy.co.uk/. Source: about 1 year ago

Yes, if you look in the sidebar on Reddit you can see a link pointing you to powdertoy.co.uk. Source: about 1 year ago

Powder Toy is not only my favorite but available on Android. Source: over 1 year ago

The Powder Toy probably fits this. As the name suggests, it's more of a toy than a game, and you may have already played a form of it if you're older. If you remember the falling sand web games from awhile back, The Powder Toy is basically that concept but run further than you might expect. Source: over 1 year ago