MIT hackers have long considered “Tetris on the Green Building” to be the Holy Grail of hacks, as the side of the building is a wonderful grid for the game.
The game started off scrolling the words “TETRIS” and then would start into the first level. As the player progressed, the second level would start with more pale colors, making it harder to identify the type of block. The third level involved the colors shifting on-screen. Upon losing the game, all of the blocks would fall to the bottom of the building.