I solved problem by myself The link http://support.openfeint.com/dev/getting-started-with-of-android-1-10-2-add-openfeint-features-to-your-game had the code and first create achievement feature for your game and then leader board in also and refer the code below where you put scores.
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.