according to her him, it took her him 2 weeks. I honestly don't know how someone can write a length 6 storygame in that time.
Simple: have no life and a part time job. Though I'm working on the former, I don't think I'll work on the latter. Not to mention, I actually wrote a prototype for Advantage 2-3 years ago, and that took me 6 months to plan, write, and illustrate, so I had a template to fall back on. Then again, the second case I'm writing is taking me a month to finish a first draft so I guess it must've been ~*magic*~.
So the secret of writing a length 6 story in 2 weeks is doing NOTHING but that.