I tried to play this game on Linux. I managed to make it running via Wine, but in-game FPS is around 3-5, it’s unplayable for me. :( Could you upload a native Linux binary? I think that Unity should have that target available. It would be really helpful. Or perhaps the web version could manage to maintain a good FPS for me, but I doubt it.
Glad it at least sort of works. There's definitely some optimization that needs to be done on the code side regardless of the platform, so the issue may not necessarily be with your video card. One thing you can try that may improve the performance is to lower your desktop resolution before launching the game, because it should automatically run in the desktop's resolution.