That’s Terry Pratchett’s "Only you can save mankind". The story’s lead thought is an adult’s and the concern about confusing video and real world is an adult’s. Still, it is so good I felt like proposing it to our son on page 6. Technology is well described and the "Alfa Centauri" game is a nice development of the starship Windows screen saver.
The language may be too complex to let him have fun, we’ll see. After German homeworks tomorrow, maybe.