Come on, folks! Just let the guy fly with his keyboard. Who knows? Maybe he has to sit through a mindnumbingly boring Land Use Law class and wants to fly his sim without the professor noticing. Not saying I ever did such a thing. No, siree! I always paid full attention in class...
And, going by some of the answers above, the answer seems to be yes, it is possible to fly the A320X with just a keyboard.