http://www.frescopictures.com/movies...me_update.html
Note the bit about Video Games near the bottom. Now I hadn't had a game system to call my own for even a year when I read the book, and I remember the "game-like" portions of the book's action as described quite well. Classic old-school, no-gravity arcade stuff, but with strategy. Lots of strategy. This would make a cool game, and I'd be more than happy to get a game based off that.
As can be expected, PA has a (rather timely) response to all of this (which I copped that link above from, as well):
http://penny-arcade.com/view.php3