Hey it looks like your download is a .exe, hence only Windows can run it.
Oh, sorry about that! Thanks for the heads-up. I'll add the Linux/Mac version in a few minutes.
Great visual look to this game! I might suggest making it possible to get to the controls screen again. I forgot somethings but couldn't get back there even after booting the game up again. I liked the level design but, some checkpoints would have saved some frustration.