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Poor little astronaut. His or her ship has exploded 100 light years from Earth, and the only way to get home is to open portals one light-year closer. Launching from rotating meteor to rotating meteor, you must collect the dark matter that powers up the portals. It's a little fiddly, getting juuuuuuust the right launch angle to land on tiny asteroids; yet there's something so very peaceful about it, gently moving through the vastness of space; and the little astronaut standing on those little islands of rock is very Antoine de Saint-Exupéry.