Right. this situation is unique because of these conditions:
1) a former atari programmer
2) working with an antiquated system
3) successfully solves a supposedly (and notoriously) "impossible" problem
4) and springs a completed game on the public without warning
5) that is also in a hand-made transparent case with weird blinky lights.
for anyone who has played Star Castle, or read "Racing the Beam" or had an Atari at any point, this is a pretty compelling narrative. One could even say that the decision to:
6) withhold the project from the public, but then
7) "suddenly" (and surprsingly) decide to release it in an unusual fashion
furthers the narrative even more.
Kickstarter really rewards the compelling narrative; the projects that tell a good story and strike a chord seem to do very well; those that don't have a hard time getting funded. In the case of Star Castle, there are a lot of elements about the narrative that make it interesting, unusual and accessible to a wider variety of people than the standard hack or homebrew. Scott just seems to have hit the trifecta and I imagining that it will be hard (although not impossible) to replicate his success. Right now, for instance, there are former atari programmers trying to raise more money from a larger community for an retro-game with an adorable protagonist that would play on modern systems; unfortunately, they are not receiving the reception that they had hoped for.