xml file vs .config

[C# Programming]

I have made a simple game and for the name and score/top score, number of turns etc. of the players, I have used an xml file of my own.
Would I have any reason to store all that information in the .config file, making my own sections or key value pairs in appSettings.

Or is the .config file is only useful when we are talking configuration?

I have read many articles on codeproject/msdn etc., but still confused.