That is beautiful!!!! I would require that it played some game music when other buttons were pressed.
That... would... be... AWESOME!!!

I'd buy one in a heartbeat.
But I would have to have this line up...
A - Punch Out (training or main theme)
B - Legend of Zelda (world theme)
Select - Mega Man 2 (Wily's Stage)
Start - Castlevania 2 (Bloody Tears)
The D-pad could have miscellaneous sound effects from different titles. And I LOVE the idea of using the Konami code for the Original Contra theme!
Someone make this!!!