Would a Linux version be possible? I can't afford Mac systems for my kids, but they will both be getting Ubuntu laptops under the tree this year. I want them to wrestle with Linux because using the OS naturally leads you to learn about Unix.
CraftStudio is built in C# with XNA. I've been using MonoGame (https://github.com/mono/monogame - open source, multiplatform reimplementation of XNA) for the Mac build for a few months and already got most of it running on Linux, I just need to find the time to get it into a releasable state.