It's more like someone ran a PowerPoint presentation through a converter that makes a web site. There's good stuff in there, but the presentation is clearly a slide deck.

No, I added all the images after writing the article.

But the images ARE from the many many presentations I have given on game design, which can be found here: https://www.raphkoster.com/games/presentations/

Many of the links are to those presentations, and many of them are deep dives on single sentences in the article.