The OpenGL extension to X. An X server extension that allows IVL to coordinate its rendering operations with those of X and other extensions.

GLX (initialism for "OpenGL Extension to the X Window System") provides the 'glue' connecting Open GL and the X Window System: it enables programs wishing to use OpenGL to do so within a window provided by the X Window System.

GLX is a cavern flying game with gravity. You control a little ship through the caverns and try not to get shot. You must race against the time and land your ship softly, while watching your energy.