Thanks for taking a look at Eldritch Academy, I hope you like it!
For this game, the "PC" build should work with Linux, from what I'm told. (The Ren'Py distribution builder says that it should work on both Windows and Linux. When it packages for just one or the other, it uses "Windows" or "Linux" as the build name.) That said, I have no Linux devices to test on, so it could be helpful to hear if this is true.