 Key developed the game using a game engine he had written in the C # programming language. The developers expressed interest in allowing player-created mods of the game; some such modified versions of the game have since been created by the community. After David Kanaga joined the development team as audio composer, the audio mechanics were refined through many different ideas, such as allowing players to create their own music within the game. This idea was cut because the developers felt it would detract from the exploratory emphasis of the game and turn it into more of a creative tool.
