Great work on this one - as has been mentioned a few times, there is quite an initial learning curve to figure out how this works and my one suggestion would be, please please please have the notebook be on the side and please remember what page you were on last. During the tutorial, I was doing a lot of closing the notebook to l could see the images, then back to the notebook, click to get to the page I was last on, repeat. It would be amazing if the notebook view didn't cover everything else and remembered your last page.
Thanks!