A core reason why recent hits like Flappy Bird and Threes found success -- and are massively addictive -- lies in the way they put us in a unique zen-like state known as flow. Nick Statt was a staff ...

When the smartphone phenomenon Flappy Bird took off not so long ago -- and before it morphed into something uncontrollable and became its own hard-to-swallow lesson for the game industry-- it was as ...