With his latest library I have now put together a nice little sudoku game.
It requires 2 resistors for the composite video output.
We also need 5 pushbutton switches. Left, right, up, down and fire.
These are wired to the same arduino pins as used by nootropic in his
hackvision board design.
How about adding the ability to have the arduino solve a puzzle (eg. taken from a newspaper)? You could type in the starting grid and algorithmically fill in the rest. That would be cool.
But anyway this is a really nice project. Well played.