Was curious what the popular posts were on HN. Lots of interestingness here: https://observablehq.com/@tomlarkworthy/hacker-favourites-analysis.
According to observable, the #1 most favorited is the web design interactive, linked above. IMO just an incredible example of where education + the web work perfectly together. Game-like.
Anyway, enjoy as I did! If there's any nit I would give, it's that the final product is compelling, but not amazing. Would love to see the author continue on to even higher levels of sophistication.