Just to add a little bit on the topic: since you're using Unity, it's very easy to make a Linux and a Mac build.
You just have to:
1. Make sure you check the right options in Unity's installer to install the Linux & MacOS players (it might be the case by default so you can just try the next step and see if it works)
2. In the Build Settings window, select these options:
Target Platform: Linux / Mac OS X
Architecture: x86 + x86_64 / Universal
3. Make a build and package it in a zip file like you do for Windows builds
4. Advertise it and ask people if everything works fine on these platforms ;)
Once you did it once, it takes only a few more minutes for any demo or game you publish, so I definitely recommend that to help grow your community :)
Keep up the good work!