Viability: Playable from beginning to end. Sometimes I feel like choices don't really matter though, that the player doesn't really have as much agency as they should in some places. A few paths always go back to a beginning one, so it can become a sort of process-of-elimination-type-thing until you inevitably pick the correct choice.
Presentation: I think ingraining the passages into the main text in some places would make for a clearer presentation, and also checking to make sure things are spaced out far enough for them to be more visible/easier to look at/see.
Engagement: I thought it was engaging! The characters are very charming, and there's a lot of personality to them. I was always curious about what would come next!
Theme: Is clear! I enjoy the overall sense of humor in the writing, too. Maybe something to consider would be experimenting more with the colors? The high saturation seems a bit disconnected from the nature of the adventure (but take this with a grain of salt cuz that could very well be a personal thing). Also having the Guide as something automatically shown would be helpful? Cuz it seems like important information that helps the player understand how the game works. Especially since it's only one page, so it's not like it'd be a hassle to click through it.