I tested the WebGL version but the framerate makes it unplayable. I've uploaded a Linux version, though. I don't currently have a Linux system to test it on, so let me know if it works.
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.