Creating a game?

Few people have mentioned that I should create a game with Mrs.G . But because I don't know anything about game development, I don't even know how to start thinking about it. I don't have a clue what kind of game it would be though ( it would have to be no porn), or what would be the genre, or what it would look like. I'm thinking if I would do anything, it would have to be small, fun and original. Anyone has any thoughts on this?