At $15 this might just be the most expensive video game purchase I make for quite a while (trying to cut down playtime/building a house). It's just, I feel so relaxed playing this. So easy to zone out (in?) to this game.
There is a demo for Win and Mac and a beta demo for Linux. Buy direct or through Gamer's Gate. Links all on this page including a link to the Steam Greenlight page. I don't see a launch trailer so have this instead (heck it could be a launch trailer - I didn't watch it).