Keyboard access to play Bloom books online

users using a screen reader listening to books on the website use only key strokes to navigate. Can someone share the keystrokes associated with the different navigation? This is what we discovered so far:
-Space bar starts “play” for the audio feature but it doesn’t seem to be consistent.
-We are often stuck on the cover page with no way to turn the page.
-Once we turn the page, the subsequent pages turn with the right arrow (down arrow is typical in screen reader usage, but this takes you out of the reading box altogether)

Thanks for your help on this.