In the secret Hackaday bunker, we have some emacs users, some vi users, and some people who don’t really care. However, even the staunchest of our emacs supporters had to do a double take at [Vreeze’s] project that creates a GameBoy emulator using the venerable text editor. You can see [Alexei Nunez’s] reaction to the emulator in the video below.
The Eboy uses unicode characters to output the graphics. You can use emacs commands to load ROM images and use your keyboard to control the game.