Guys, if he can't beat playmoney games, he's going to loose 20$ at 2NL in a hurry.
2NL is infinitely harder to beat than playmoney games. It's not even close.

You exploit the average playmoney table by just playing top hands... don't even worry about post-flop. Play as many playmoney tables as you can and just push AI preflop with AA, - JJ, and AK down to AJ, and you should be making a couple of buy-ins / hour. If you keep playing higher - the highest stakes playmoney games play somewhat like the lowest stakes cash games.