It uses a Lua 2D engine, and idea is that player gets to explore the ship's computer and its API interactivley, (drawing a lot of inspiration from Emacs).
spaceflight programming adventure... The game is played by interacting with your ship's onboard computer. ...Communicating with space station and planet port computers is done over an SSH client that also lives inside the editor. But all the various modes of the editor are configured with Lua code that runs in user-space;