A scientific has discovered an unusual binary system of two dead stars, a black hole and a white dwarf. The discoverer named to the black hole DNS-1 and to the white dwarf DNS-2. DNS-1 has the strange property of move, appear and disappear to the observer's will. The scientific decides to play a while with DNS-1 and DNS-2 instead to publish the discovery.
The main mode "arcade" has a score list