Continuity mistake: When Evelyn has taped up Joy to the chair, we can see the tape move up and down between shots, showing there were multiple takes.
Continuity mistake: Evelyn is reading the instructions for the transition. Item 4 says "Don't forget to breath." When she reads them again prior to pressing the green button, the note now correctly says "Don't forget to breathe."
Other mistake: When Evelyn becomes a rock, the other rock says they are in a universe where the conditions weren't right for life to form. During this scene, insects are visible flying and moving across the frame, and a grassy plant is visible in the lower right. These would not be present in a universe where life could not form. (01:41:06)