If you don't know what Cythera is, you may want to visit this page to get some information about the wonderful game. The link is www.ambrosiasw.com/games/cythera/ If you are too lazy, I can put up some screenshots right here:
It was released in '99 (created by a bunch of people). And it's very Mac-like. There was, however, a PC-port project in 2000. But their page vanished. And so the project.... I doubt it will ever be released for the PC.... But of course, there are emulators!