Above. I've managed to do, build and play the FPS Creator, Puzzle game and Platform game tutorials successfully, however, I've downloaded the Ruby's 2D Adventure and FPS Microgame tutorials and built them for Ubuntu and they don't work. It's the latest Ubuntu distro on an Ubuntu Desktop PC. What happens is that the games just go to a blank Unity screen and don't show the games at all, so I have to press Alt+F4 to quit back to Unity. Anyone got any fixes?