(There's no video for Tetris Light yet. Please contribute to MR and add a video now!)
Tetris Light is a very basic Tetris clone. It has 2 bit graphics (green and white on color disaplys or B&W on older monitors) and features configurable control keys, but you cannot accelerate the piece drops, only drop them fully at once, or wait until it slowly drops by itself.
TetrisLight.sit (34.95 KiB / 35.79 KB)
Tetris Light / compressed w/ Stuffit
System 6 - Mac OS 9.2.2
Emulating this? It should run fine under: Basilisk II