I'm not familiar with cocos2d so I can't help with specifics but.
I'm not familiar with cocos2d so I can't help with specifics but: If you can determine the player collided with an NPC, just check if the bottom of the player is what collided with the top of the NPC. If it did, he must have landed on his head. To be extra sure, you could also check if the player's velocity states that he's moving down but that's probably not necessary.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.