Now that linux is supported, could GOG add the linux version?
I hope GOG will add a Linux-package soon ... however it should be noted, that even though advertised as such, there is no native Linux version of FEZ available. That's still just the Windows/.NET executables. As Phil Fish said it so very eloquently: "This is a console game for consoles" :(
On the upside: a game controller -- like for example the Logitech F710 -- works brilliantly with it, even under Linux. The game recognises it as an Xbox controller.
(In case you're wondering: I got the so called Linux version of this game through Humble Bundle.)