Bang! Gotcha! Yer fired!As more and more Americans find themselves sitting at home in their tattered bathrobes at 3 p.m. on working days, videogame sales have gone through the roof. Last year, Americans spent $22 billion on games -- a 23 percent jump from the prior year. Now, here's the funny part: Many of the unemployed folks listlessly gaming through the day are themselves game designers. While the industry has recorded record sales, the men and women who design those games, quite a few of who