Star-Twine is now out on Linux & macOS!
It might seem strange for this to happen a decade after the game's release, but it's true! The port was done by developer Ethan Lee using FNA, an open source re-implementation of the XNA framework that Star-Twine runs on. This port would also not have been possible without the many community contributions to the FNA project.
If you run into any issues, you can post in the Steam Discussions, or email Ethan or myself. Enjoy!
-Eric