Øyvind Berntsen added LEDs to the cells of his bookcase, then made them programmable. With them, he can display pixelated images in multiple colors.
Berntsen first used the setup to create a game of Snake which ended with a marriage proposal to his girlfriend, Nadia Tokerud. You can see the romantic scene here.
Having secured Tokerud's hand in marriage, Berntsen sensibly converted the system into a game of Tetris. There are so many options with this gaming platform!
-via Lost at E Minor