Sudoku Ipod Touch

Do “Apps” suck the juice out of an iPod touch’s battery life?
I just got a new iPod Touch, and am finding that the battery life is not very good, only a couple of hours. I’ve mostly been playing around with my applications (checkers, connect 4, sudoku, hangman, ect) Do these apps suck out battery life?
I read on the apple website that ipod touchs were supposed to last for 6 hours of straight video use and over 30 for constant music use. Are playing with apps that much different from watching videos?
dim the brightness
sudoku for iphone/ ipod touch

As far as apologizing for you being slow, considering that I personally have made a few larger orders recently your backstock has probably had a sizeable dent placed in it and I totally understand that dfzhfgxh.