Metal Slug Midnight Madness!!!!!!!!!!!!!!!

So me and my little 7 year old cousin just beat Metal Slug 4 and 5 tonight.... we have no lives. =/
Anyways, i'm just waiting for him to go to bed so i can play some Mature game that cusses and he's not allowed to hear that kind of stuff. Or if my buddy comes online on yahoo i can challenge him to some Battlefield or Quake 3 rocket arena madness. muahaha