There was also a suite of Windows games I played back in ~2003 that occupied maybe a 32x64 window each, and one of them was mini Tetris. As I recall, the developer was Israeli. Anyway it was awesome for playing casually in stealth mode; there were no window decorations and the games were well made. I think one of the other games was pool. I haven't been able to find them since.
Have you tried asking in the subreddit "tip of my tongue" [0]? I have been amazed at what they can figure out about obscure stuff with very abstract clues.