Motivate ur employee by playing game

One article that i read in book called the truth about managing people said that to motivate ur employee is to make them feel the flow. What is that?
Flow is described as a feeling of joy of doing something. Doing it no long period of time and losing track of time is some of the characteristics. Well it just like playing game for a gamer.
If a gamer play the game they love, they could spend a lot of time just to finish it. And when its done then they will feel an overwhelming feeling of happiness.
The same with job. You have to design a job that will give a sense of flow. How? The job must challenging, goal oriented, have a feedback process in place and using high level of skill. Why using high level of skill required? So that it feel important enough and challenging enough.
Managing job is sometime like choosing the right game for a gamer to play isn't?

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@Mobile