Earlier quoted context omitted.
Came to say exactly this. I can read it if I try hard enough to scroll exactly as the author intended, but it feels super weird.
I thought it was neat, but scrolling broke at page 4 so I had to use the widget along the left edge to get to page 5.
The idea is neat, but the implementation is a bit too over-engineered and hard to use. Hope this helps change that!