*SPOILERS*
I love the idea behind the game - it's a fantastic introduction to basic philosophy. You did a great job of accurately building and then breaking down Mills and Hobbes.
Kant's philosophy was explained very well re: good will and the categorical imperative, but a better argument against him would be that 1) he fails to successfully define what the "good" of a good will is (i.e. what do you mean by "good," what makes it a "good") 2) he willingly leaves himself wide open to criticism regarding the possible existence of a deity or any metaphysical morality, or 3) he fails to explain why the dignity of man should be considered at all or even why man is entitled to his dignity. The problem with arguing that his non-consequences philosophy is built on "not willing a worse world" is that I'm not sure Kant ever cared what sort of world we willed at all, which does away with the accusation that defeats him.
Nit-picking aside, I really enjoyed the game. Well done!
 "Socrates Jones: Pro Philosopher"){kind=icon}
 "The Peacekeeper"){kind=icon}
 "400 Years"){kind=icon}
 "Super Adventure Pals"){kind=icon}