I've taken the sourcecode of glTron, another Tron clone that looks really great and hope it will help me a little in my quest for my first game ever! I decided to use exclusively GLUT for the moment, but as soon as my skills in Xlib programming get high enough, I'll try to use that library instead of GLUT.
At work, I managed to fix a bug! But the fix created another one. Grrrrr...