I like that you didn't waste any space, opting to use the map as the cover. The artwork is striking, especially on pages 2 and 3.
You did a great job keeping the descriptions down to just the most important info. I think the conclusion works well, and I think if I ran this I would simplify it to 1 reality/timeline crafted by each player rather than rolling 2d6.
Rolling for the Machine's Nature modifying how the Primes/Invisible Stalkers behaves is a great idea to keep things interesting. I would suggest adding the label "Prime Inhabitant" next to all 3 of the applicable monsters on page 5.
I liked the dungeon and the monsters. A GM might want to add some extra NPC interactions, possibly opting to greet the player's as the Mad Mage and instead break into combat at a surprising point of the conversation.