The short answer is that it’s not part of this Kickstarter campaign, and we won’t know if we can support it within the next month.
The longer answer is that we want to get this game into as many people’s hands as possible, and that means supporting as many platforms as possible, including Linux. If you read the Game Informer piece on us, you may have seen a phrase we use internally: “Minimum Awesome”. We want to make the best game we can with the resources we have, and part of that is controlling our scope. That includes platform support. We want to make sure that everywhere we release the game, it’s the best it can possibly be. We would like to do a Linux version, but don’t want to do so until we’re confident that we can do a great job on it.