This guy is pretty amazing...seems to be getting better by each video.

http://www.youtube.com/watch?v=_UD7pA5YXBA

Older stuff...

Zelda
http://www.youtube.com/user/MattyGth.../0/HLpCL9AU8gs

MegaMan 2
http://www.youtube.com/watch?v=UMgUN...eature=related

Tetris
http://www.youtube.com/watch?v=ap6vsjtcjcE