There are two versions - a Win '98 version and a Win '95 version. I'd imagine the 95 version is not really a going concern right now. The 98 version DOES still work (On XP), but it uses an unusual soundcard setup. Right now I can play it any time I like... as long I don't mind having no sound.
Time was I could almost play it in my sleep I was so used to it, but now... I need the sound. So I haven't really played it for a while.
