Download the soundtrack: https://soundtracks.martinstraka.de/track/understanding-games-soundtrack. 
For more information on computer game theory and game design have a look at the recommended readings: https://web.archive.org/web/20110830171650if_/http://www.pixelate.de/games/understanding-games
Episode 4 is the last of four games explaining the basic concepts of video games. It deals with identification in video games.
