Also had a Tetris that is still the nicest clone I've ever played. For years after, I'd load my GeoWorks onto an old PC just to play the Tetris. I probably have the GeoWorks disks in my garage still.
I'm 100% confident I've played that exact Tetris, but on Linux with Motif on X. So I think you'll find, if you poke around enough, that source code is alive and accessible.
https://www.dropbox.com/s/n78x5cp8na4iilq/InternetDirectIncP...