Since nobody's mentioned this yet: this must be a left-over from or tribute to Glitch (https://en.wikipedia.org/wiki/Glitch_(video_game) https://en.wikipedia.or

Since nobody's mentioned this yet: this must be a left-over from or tribute to Glitch (https://en.wikipedia.org/wiki/Glitch_(video_game) https://en.wikipedia.org/wiki/Glitch_(video_game)) the video game project that Slack originally grew out of.