Guy uses Raspberry Pi to create playable Gameboy costume: Ohayocon 2014

I feel my last few posts have been a bit negative, I need to cheer up a little, find some good in the world. How about this video of chap wearing a playable Gameboy costume at Ohayocon 2014. It was apparently done using a Raspberry Pi, you can switch games and everything. Now I need to hunt the guy down and find out just how he did it. I would wear this to work.