Thanks for asking! Right now Jason The Greek is going to be available for PC - in fact the demo is already available for PC users here: www.jasonthegreek.com.
I am working with Visionaire and right now I believe that the plan is to create Mac and hopefully Linux support and also support tablets etc. which would be awesome. If and when this happens I'll be sure to update you!
If it doesn't they I will make sure that the game is ported onto Mac and Linux using a third party software / company if needs be as I want to make sure that as many people can join the adventure as possible!
I would love to get it onto tablets as I think this is an amazing platform for this genre of gaming!