This wasn't obvious to me from the appearance of the page (I guess my screen is large enough that I didn't see the arrows in the bottom-right corner), but this

This wasn't obvious to me from the appearance of the page (I guess my screen is large enough that I didn't see the arrows in the bottom-right corner), but this site is actually a presentation. So, a heads-up in case anyone else has the same experience: the page is interactive, and you can navigate with arrow keys.