Hi Nitonise,
No Linux version yet, but I recommend you try the extended version ( https://bhimz.itch.io/onnarpgex ) -- it's browser based, so you should have no problem opening from Linux, plus it has updated graphics and gameplay. Hope you have fun!
Firstly, your online game doesn't work.
Secondly, come on man, is it that difficult? You just need some additional files for Linux version. Even I was able to create Linux version of your game by just coping some files from Linux version of another MV game.
P.S. There is link for universal version of your game, that can run under Windows AND under Linux
https://drive.google.com/open?id=1bEvIHDzLINFlm5URqTGQ7ttNKkcb01CS
