Yeah, my fear is that in print it will get eaten by the center of the book, making it just off center either way would work. I would have him stay facing the center of the page as it gives the layout a nice kinda spiral look.
It looks ok otherwise though, just the title and creature need moved? I'll see if it can be photoshopped over a bit.
The text boxes clip into the text, the one on the right is mostly fine, just the H in HP. Looks like it's just some basic adjustments needed.