3D maze, shoot 'em up with elements of strategy to keep you awake.

Collect the small clouds which float about the tunnels as these increase your energy. Destroy all the webs by shooting the grey blobs. Don't shoot the eggs, as it wastes energy. Only attend to the ETUs when they are at 'Danger' or 'Critical', or you waste time. The other objects in the tunnel are only there to get in your way, so don't waste time and energy shooting them. The first three levels are the Tunnels Of Ceres , The Tunnels Of Ganymede and The Tunnels Of Phobos...