Great use of trifold to make a One Page Dungeon style scenario! Seems like it's both atmospherically and mechanically tense. I like the concept too - I expected something about brainwashing on account of the Dollhouse show, but was pleasantly surprised with the theme here.
On the other hand, it seems like it'd be a bit of an arbitrarily executed grindhouse once the doll is collected. I don't see any way for the players to 'play smart' and circumvent or prepare for dangers.
Could be a good funnel session. It feels so close to being perfect to me, like it just needs some small tweak to make player agency matter more.
Hard to make 'scary doll' stories scary, but I think there's some real latent tension in this one. I got House Of Leaves / Minotaur vibes. Well done with the layout and atmospherics!