Hi! First and foremost, thanks for the freebie! :)
I'm afraid the Linux build is somewhat borked, though. It's playable, but it has a strange graphical glitch. It's not easy to explain in words, but basically the whole screen is replicated in the lower left quadrant (and, in turn, the lower left quadrant of that quadrant is completely black): see here and here. I didn't find anything in the log that could explain this behavior.
The Windows build doesn't have this problem (I could run it with Wine + DXVK).