ver. 0.5.11a
windows 7 x64
I get a error when starting it with the win64 public version: "Can't create an opengl 3.3 rendering context", not really sure its a bug on your end, when searching it seems to have something to do with the engine itself.
I'm playing with a notebook, possibly the cause has something to do with optimus technology, just figured I'd let you know and maybe help someone else who gets the same error.
Is not a fix, but win32 version works fine.
great game btw :)