My memory was that it was a fun game. Thanks to the C-64 SID chip, the "Ghostbusters!" voice and music was decent (even though I suppose it got repetitive after a long play). Gameplay was good once you figured out what you were trying to do and prevent, and initially it was slow enough to allow mistakes. I do remember at the end it got basically impossible to keep up, so you would always have an endgame, and I guess I didn't get to that much since I don't remember exactly how that goes without finding a video of it (but of course know how it should go, since I know the movie well).