[dkersten]

That doesn't mean he didn't have a lot of prepared material. For example, when I was in school, I would have an essay planned out days in advance of an english exam, despite not knowing what topics were available until actually sitting the exam. With practice, its possible to bend and twist the given topics so your prepared material fits nicely. I imagine you could do the same with LD - plan the gameplay and art style and how different aspects should be coded in advance and then tweak it to suit the theme/topic once its been announced.