I just loaded up the emu (I know it's not the real thing) with V-Tetris and put on some 3d glasses. That gave me a headache. But yeah, Tetris is fun on anything you can put the damn thing on. You could cut out little pieces of paper in the tetris shapes, and slowly move them down in front of me and let me tell you where to move them, and I'll be happy.
In summary, Tetris.