This is what was working on for the past few weeks; a cell phone that looks like a game controller ripped out from it's console. It's not a Nes controller, but any controller should work. Also you will need a donor cellphone. I wish i had a nes controller though, it's bigger & has enough space to house a touchscren. But I had to work with whatever I had.
Some of you might ask, why? It's just, it's a geek thing & perhaps only a geek would understand the significance of it. It's for those who like some nostalgia in his everyday lifestyle, but could be a fun project for anyone for that matter.
Step 1: Acquire Donor cellphone & Start stripping it.
Take it apart, if the entire phone fits inside the controller, well and good. If not, take it apart, get rid of back & front plastic cover. This will make it thinner. And will fit more easiy.
Then cut out the back of the controller so as to let the keypad & screen pass through.
(Use any sharp tool to outline the shape of that window and scrape that outline repeatedly until the middle plastic portion falls off or can be snapped easily. Use a scale or calipers & find out the rough shape to cut out.) Use a file to smooth out everything.