The Science of ‘Flow’ in Game Design

Via Nick Statt on CNet:

“There must be a clear and simple task; that task must provide instant feedback; there must be no distractions that either disrupt your concentration or make you ultra-aware of your own actions; and, key to the act of game playing especially, it must be a challenge with appropriate balance with regards to your own skill and the task’s difficulty.”

There are huge monetary rewards if you solve for flow correctly.