I have no idea how to play code:deck or if it is even a game. What I like is what is implied by “code on a card”. It harkens back to the days when best practices regularly defined the ideal size for a function or class as enough code to fit on a single printed page. In recent years this has come to mean “fit on a single screen” which is also reasonable. The ideal column view, for me, would be a contextual column view.