As was stated during the kickstarter, Mac and Linux development was stopped due to lack of resources, and only restarted, and those versions confirmed, once the goal was reached. As described, the Mac version was completed first, and then work began on the Linux version. Unfortunately, there were delays and interruptions due to problems with both the Mac version (issues with Yosemite and low end graphics cards that required a workaround in the game) and Linux.
