Cameras are skewed

The 3D scene cameras for each eye arent pointing in the right direction, causing double vision.

Hold a finger 2 inches in front of your right eye. Close your right eye. The finger should be on the far right edge of your left eyes vision.

In this game, remove your phone from the cardboard and point the phone so the right eye/camera points directly at a pipe (so the pipe is in the middle of the right half of the phone screen). Unfortunately, youll notice the the pipe is to the LEFT of center on the left eyes portion of the screen, when the pipe should be RIGHT of center.

JamishS about VR Flappy for Google Cardboard