Ugh, that site is painful to use. Broke my back button. Checkboxes don't actually check. Advancing the slideshow/presentation/whatever can only be done by click

Ugh, that site is painful to use. Broke my back button. Checkboxes don't actually check. Advancing the slideshow/presentation/whatever can only be done by clicking the right angle at the bottom right, which is miles away from what I'm doing at the top left on my big desktop. Yikes.