The framerate is x2-3 times better, it’s around 10-12 I guess. :D It’s almost playable now. :) Perhaps my video card is not good enough to process this goodness. :’(
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.