It is 2096. Your ship is called to Earth to defend it from an asteroid wave. You do it with a use of touch targeting pad in your cockpit. Dont try to point at the asteroids directly - that wont work ;-). Instead look at the asteroid and relate its position onto your targeting pad. And do it fast, as there is only minutes before Earth is destroyed!
Earth Def(ender) is a great little spaceship shooter.
It is worlds first first person shooter/flight simulator utilizing the visual correspondence paradigm.