Lego Batman

I'm unable to play Lego Batman on my PSP too often because my hands get numb so fast.  I usually play it during the commercials of my shows then turn it off (sleep mode) when the show comes back on.  This way I can play it and wont get numb because I'm only playing it for 2 minutes at a time.  It is frustrating though that I can't play it for hours at a time lol.  It's a fun game.