The Elementalist DEMO has been built and lightly tested on Ubuntu 16.04 in both 64bit and 32bit versions! Get it here:
Download The Elementalist DEMO
As with adapting to any new platform there were a few wrinkles that had to be ironed out but I think my ironing was relatively successful and should improve the other installations in the future. Linux is definitely the most restrictive operating system to install into and getting the permissions set up in the file system to allow saving the game required a bit of fiddling but the end result seems like a solid cross-platform solution that should hopefully endure.
I also found a number of minor differences in how Ubuntu's window manager works with setting up windows and screen buffers that forced a few minor alterations but I think everything is once again smooth across all platforms. Phew!
I have not finished building and testing with Fedora, but I have also put a raw zip file here that contains the executable java as well as the content and launchers (.bat file for Windows and bash shell script for the rest of the world). It should be identical in function to the versions installed by the more full featured installers but it does not include a JRE so you will have to have Java 8 already in your path. If that sounds like craziness to you stick with the installer. :-)
If you know you have Java 8 (or don't mind a little DIY to get it) the zip version here should actually work on any platform. Feeling lucky, punk? Give it a try!
Let me know how it goes for you!