This program is a simulation of space flight in a hypothetical space-ship capable of traveling several million times the speed of light (as perceived by the passenger). By operating pitch, yaw, roll and thrust controls, the user may fly the simulator to other planets in the Solar System, and to nearby stars.
There was at least one "easter egg": If you flew near Pluto and positioned in such a way that Pluto was visible and was blocking the Sun, the game would send you through a wormhole to a randomly-selected star. The phrase "Umbra Plutato, Nu Wop, Nu Wop!" was a Dartmouth inside joke referring to "Data potato du wop du wop!", an error message displayed by the "Avatar" smart terminal (used mainly for word-processing, but a stand-alone microcomputer in its own right.) The "Data potato" phrase was a quote from a full-page cartoon by James Stevenson in the New Yorker magazine (1979 August 20, page 29).