It's meant to be educational, but I can see how a writer might use it to construct new worlds. I built myself a lovely super-Earth, bathed in the red light of a Class M star about .38 AU away.
|Mwahaha, I feel like God.|
Next question becomes, what music do you listen to while you're playing God? Methinks some Sigur Ros would be more appropriate to world-building. Or maybe some Tchiakovsky.