Hi tapwag,
thank you so much for trying the game and sorry for it actually not working on your machine! :(
It is correct the game currently requires DirectX 11 to run. This may change in the (far) future, but sadly I can't promise you anything on that as of yet.
What I can do though is providing you an actual Linux Build of the game! This one should be okay with anything from OpenGL 3.2 upwards.
I just uploaded it to the game's page. If you are still willing to try, any feedback on how that goes on your machine would be highly appreciated!