I wholeheartedly wanted the game to be so simple anyone, even non-gamers, could pick it up and learn how to play in under a minute. I wanted it to be ‘easy to play, yet difficult to master’ – simple cards, simple rules, simple gameplay but, like chess, deep enough for strategy and with an infinite number of combinations.
One of the ways I did this was to use color: red for offensive, blue for defensive, purple for specialty/augmenting cards and green for cards that determine who goes first. It was a simple device that anyone could see, quickly understand and use.