WARNING: OPINION ABOUT ENDING INCLUDED.
Quite well written, and it's a heck of a bloody journey, personally felt myself more in shock than leafing most of the time. The ending was a bit frustrating , but it is part of the lesson, so it's good.
As far as suggestions go, having art for the enddings sounds like a great/funny reward (but it's more work).
Check marks for paths already completed kinda sounded like a good suggestion, but since the text pages are so short before options, it feels like marks are unnecessary.
So overall a good experience.