The writing on the wall behind Simon (Nico Ford) says, "I will stay with my sister at all times," repeated over and over like a punishment in school would be on a blackboard.
The toys, Pokemon trading cards and Gameboy Color in Young Jack's bedroom are all from the 1990's, giving us an idea of when he may have been a child.
Jack running through the forest was shot in the middle of the year, but the leaves were changed in post-production to resemble Autumn, coinciding with Halloween being a major motif in the story.
The children of the cast drew some of the credits.
When young Jack (Vance Griswold) is walking down the hall after leaving Simon's (Nico Ford) Halloween room, a police radio can be faintly heard and the lights on Jack's face are red and blue like police lights. This is of course coincides with his adult life outside of the simulation.