I'm looking for an old game for X11 but I can't remember it's name. The game was a 4-way scroller in a small, non-resizable window. You ship was always in the center of the screen. Your objective was to destroy enemy structures that were made of some kind of curly "mesh" that you had to shoot out of the way until you could hit the core itself. Hitting the core would eat the remains of the mesh from the inside outwards.
There were no fancy graphics and or sound. While you shot the mesh, small ships would appear and shoot you.
Any ideas?