Maybe it's just me, but I didn't understand the (slideshow) interface. I saw "click to begin" and I saw a down arrow, so I put the two together and clicked "down" to begin. Then I saw a list of archives, and if I continued down, it ended. I assumed I had to click 2019, so I did that and I was back where I began. It took me trying that twice before I realized I had to click... anything except the arrow.
Also clicking through on it seems to have a massive lag at the moment in loading slides (presumably due to a spike in load courtesy of HN frontpage appearance amongst others?). I just saw the same cover slide over and over again until eventually it caught up.