To be honest, I did not even realize that I added a Fullscreen button, and you were right about the text(nice observation)! The way the game works is that it teleports the camera +800 or -800 on the x, y, or whichever direction you go. That is most likely the cause of the black screen, as the entire background is set to a default black! Thank you for these observations, and I will do my best to fix them in the future!