As a kid, I remember the Windows version from being included on the disk that came with the book, "Windows Magic Tricks," published by Sybex.

Years later, I was surprised to see the exact same cat on a "port" to the Sega Dreamcast VMU (a memory card that can function as a stand-alone device, with a 48x32 pixel screen,) where pressing a button would play one of the animations. It makes a little more sense now, finding out that the cat images were released into the public domain.