(There's no video for SimpleTetris yet. Please contribute to MR and add a video now!)
This is a very nice Tetris game. To play, use the number pad. 4 is move left, 8 and 5 are rotate, 6 is move right and 2 is soft drop. There are two games: SimpleTetris and SimpleTetrous. They are pretty much the same thing. You can delete the SimpleTetrous one if you are short on disk space. SimpleTetris is a great choice if you are looking for a Tetris clone for your vintage Macintosh.
simpletetris.sit (215.02 KiB / 220.18 KB)
System 7.0 - 7.6 - Mac OS 9 / compressed w/ Stuffit
This game should run well on most old Macs with color. System 7 is required. I am not sure about compatibility with System 8 and above.
Emulating this? It should run fine under: SheepShaver