There doesn't seem to be mention on a Linux version at all, rather just a Mac version.

I have to wonder, if you create a Mac version of a game how difficult would it be to port it to Linux?

I understand that games designed specifically around Windows (and therefor DirectX) are going to be a pain to port over to a platform without DirectX.

Surely though Mac versions of games are all based on OpenGL and most Linux distributions have OpenGL support too (as well as both being Unix type OSes) so surely the port is not that difficult?

It almost seems justified to have some project that aims to make it easy to port Mac games to Linux, if that was the case then you would see a massive increase in the number of Linux games available.

They are using Moai (getmoai.com) which is a cross-platform LUA based open-source game engine. It outputs to Android, iOS and Chrome. From what i gather you can develop+test games on Mac or PC but it doesnt compile to them much more so for Linux. The Chrome part may play in linux but not so sure about that.

Interesting, I had a quick look at the moai docs and the library mostly looks like a wrapper for OpenGL and it already targets android which has a Linux kernel.

There's no official announcement yet, but the unofficial plan is to support Linux once the Mac version is out the door. They definitely want to do it.

The email that went out this morning to funders specifically said (in bold) "No Linux version, no multiplayer" in the first version..

Even if they get more funding, the "Stretch goals" are all around more content and more tools, not new features or new ports..