"Urban Flipper" playable pinball game (Ufunk.net)
Actual playable Tetris by the great minds at M.I.T. (The Tech)
Video light show from Projekt P.I.W.O. featuring Pong, Tetris, Mario and even Michael Jackson.
The World's Biggest Drum Machine (UPROXX)
This Ukranian light show displays many fantastical elements utilizing a 3D projection system (Gamma Squad).
(Images: Drexel University; as linked above)