The moving bar revealing text is ok for keeping text from moving but it feels weird when part of the page is from one page and another part is from another. Reading with the arrows to just 'flip' the pages worked better for me.
Because the 'next' page starts at the top, it creates pagination / layout issues when a paragraph is split between the top and bottom of the page with the scroll line. This is tolerable in page flips because the previous part of the paragraph is gone, but distracting in partially turned pages.
All in all it was an interesting thing to look at and think about though.