This is definitely a cool demo.

One detail I noticed that might be worth adjusting is that I assumed clicking on the "Flip" box on the right side of the page would actually flip the page.

So from a usability perspective if you were actually implementing this on a real site, a popup when you click on that explaining how to swipe/drag the page over could be helpful since this is a new style of changing pages not everyone would expect? Or just make clicking on that button actually flip the page, although that kind of ruins the point of the design.