All of Abbie's scenes in her Stone Manor are filmed with the camera(s) at a Dutch tilt which means that the walls and floors are at an angle compared to the vertical and horizontal edges of the frame. This is done to increase the feeling of unease.
Whilst Abbey is walking round stone manor she starts off wearing 3 in Harper boots seconds later they are flat heeled boots
Whilst walking around in the underworld Abbey starts off wearing 3 inch heeled boots shortly they become flat heeled boots
At 1:36 when Abbie says "We're not in Kansas anymore, are we?" she's paraphrasing what Dorothy says when she and Toto arrive in Oz.