A few minor corrections. GalenEvil disappeared at an essentially random time, not the end of his contract or a particular unit of work or after a payment, just disappeared one day. Frankly my biggest concern with respect to his disappearance is that he's ok. He did not abscond with any money or to the best of my knowledge avoid doing any work. Whatever the reason, he just quit.
As for the work done, he knocked out a good bit of infrastructure work that we planned on having him do. He did not make it to the headline feature, but not for avoiding it, he was following the development plan we had laid out and simply did not make it that far.
I don't have the figures handy, but the kickstarter raised about $9,000, a large chunk of which was paid to the hired developer as planned, and the remainder is in bountysource, waiting for someone to tackle the various issues laid out there to move us toward z-levels. I'm aware of three different people that have attempted to tackle some of them, but so far there hasn't been any solid progress toward those goals.
To put that figure in perspective, if developed commercially DDA would easily be a million-dollar project if you only count the programmer time spent on it.