Too bad it's the kind of game that's really hard to defend purchasing. Buying it blind is very high risk because it's unlike anything anyone knows. And it's simple enough that most people will be able to get tired of playing from the demo alone.

That makes the group of people who have a gameplay reason to buy it very small. I suspect that most people who buy it do so to support the genre. Which is a great reason, sure, but usually not one that pays a lot of bills.