Game is solid, charming, devs are working full-time on it (with updates and new content coming quite frequently) and open to discussion about the game, and Steam version is coming soon.

Don't be fooled by the premium money side, it's far from needed, especially with the task system providing quickly enough to buy the few things worthwhile (mainly, more tasks), and you can grab a decent amount in-game.

EDIT - Post-full release, the game is even better. More heroes, more systems to play with, and a dev still working full-time on it. It's well worth its price, and the demo has been expanded with a third level allowing people to get a better idea of the game.