@stuartyeates I was thinking of writing something in AMOS on the Amiga, using the fixed-width Topaz font or simple block blitting. There's hardly a platform out there which would struggle with Tetris. IIRC it began as a "terminal" type program on a Soviet '80s computer.

The playfield would have to be stored as a simple array, probably with border sentinels. Seen some versions which actually don't though and look up pixel values instead...