Towards the end of the movie, Carmen hands a guy some 3D glasses with a crack in one of the lenses and says something like "Sorry it's the last one," but less than a minute later hands a different guy a pair of 3D glasses.

In the scenes with the Capitol building in the background, look carefully. Although it is implied that this is Washington, you can see the Texas flag flying. This occurs at least 2 times in the movie.

In the scene where Juni finds Carmen in Level 4, they are on a cliff. They begin crossing a virtual bridge, then in the next shot, they are back on the cliff.

There is a scene in which Daryl Sabara is told that Level 2 takes place on the dark side of the moon, yet when he does reach Level 2 he is facing the Earth and there is ambiant light present around him- something the dark side of the moon would lack.

Dinky Winks has a branding iron that says 'Dinky' when it faces out, but we should be reading it backwards. When he uses this brand, then it will be backwards.

At the end when, Carmen calls Gary for help, she is inside the robot's mouth, about to be swallowed. When Gary gets there, she looks like she just got picked up.

During the race scene Juni is helped by his grandpa when falling off his vehicle, but wouldn't his grandpa also have to fight to go back to Earth?

During the fight scene between Juni and Demetra if they were in virtual reality how did it seem to hurt Demetra when Juni hit her or when she ran into the wall?