Wow. Firstly, may I congratulate you in advance on a very, very good storygame. Secondly, I played through pretty much every conceivable combination of routes I could think of, with no bugs or weird page loops/dead ends or anything like that. So that's good. The items worked as intended, so that was also good. I did find some things while proofreading that I thought I'd mention, but they're mostly pretty minor.
“Office Hours”
Clean up the bottom of the pages, by removing extra lines. (This goes for all of the pages, unless that's the look you're going for)
With only thirty minutes until remedial grammar, Gower furrows his brow and thinks for a moment, then responds with confidence:
Add a comma
“England: Year 1200--1”
Taking a moment to admire the Great Seal of Shaftesbury Abbey, he knocks on the sturdy double doors;
Add a comma
“England: Year 1200--4’
He is at a dead sprint away from the Abbey when he hears the knights ransack Marie’s room; praying she is okay, he activates the return sequence.
Add a comma
“Ancient Greece--1”
Gower hears a loud thud, the clash of steel on steel, and the sound of a sword piercing flesh; a grotesque sucking noise that he remembers from a brief trip to the Colosseum for the first Olympics.
Incomplete sentence, suggest changing semi-colon to colon
(also the last paragraph seems to be a different font on this page)
“Ancient Greece--Fail 2”
“No, no he isn’t," Boras ??????says to the fallen professor. “Hello Gower, it would appear you have been a thorn in my side for the last time!”
Not sure what the question marks are, but they appear when I try to read this page.
Also, some extra instances of “enter” creating gaps that you could slim down to make it look better
“Greece: Year 427 BC--1”
Most of the font on this page is different, in the same way the font from Ancient Greece--1 is different. Looks to be font size.
Also, a trend I noticed in this section is “Medea” and “Madea” both being used. Looked it up and seems the correct spelling is “Medea”, although perhaps both are correct, I didn’t do that much research. Letting you know just in case it wasn’t purposeful.
Hopefully this helps! This is a killer game, and I'll save most of the story feedback for a review, but the twist was awesome. There was an easily noticeable pattern though, similar to Inheritance House in the way the paths are made, so if I could offer any advice, it would be to add some distinction to these parts. If you have any specific questions beyond this, feel free to PM me cause I'd hate to spoil any of the story for these guys.