Heya! If you're interested, the source code's linked in the game description (Also a direct link here https://github.com/SethRaeder/Zephyr). It's MIT licensed, so anyone can copy and redistribute as long as they keep the license in their project. You're welcome to take a look if you want!
Other types of contributions (art, voices, and the like) I'll be holding off for now, I need to create some better tools for character creation first when I have the time.