Hi there, really glad you liked the game! AFriendlyAvocado is right (assuming something else didn't glitch out along the way...). You trigger the final third of the game by reading the single news story / paperplane left at the spot where the homeless mage started.
Just for a bit of context, that trigger went through a bunch of redesigns because I really struggled to make it unobtrusive but also relatively obvious - I'll definitely do another revision for the next build. Thanks a lot for getting touch, and again I'm really glad you liked the game!