For those who stick with these kinds of projects, it would be much more interesting to hear about what happens next, in retrospect. The discovery of the next 90 percent of the work, then the next 90 percent after that, and after that. Moving from the idea, through the exhilaration of the almost-playable proof-of-concept, to the inevitable standoff with the devil in the details. The frustrating process of becoming acquainted with the unknown unknowns.