nice idea
But it can be a little better, for example: by the fan-part, if you enter a wrong value you get the message to find out a better value, and then you can't do anything except shutting the game down, and starting over.
That is kind of annoying after 10 attempts, but hey that's my opinion.
The game itself is nice, and done good, but as i mentioned before, it can be better, for the not-having-to-repeatedley-starting-th e-whole-thing-again stuff.
But that's just my opinion.