I'm running the game in a Cube at 400 (or was it 450?) Mhz and it is really smooth. The attention to detail is a clear sign of the quality of the game, as well as the quality of the developer. Great graphics and sound. The only thing that should be changed in my opinion is that ghosts should be slower than you are (at least on early levels). But this is just a small thing really.

And best of all the game is freeware. Well worth your download.