This is my first question in any stackexchange board, but I've been reading Stack Overflow answers for a few months. I hope this question is appropriate for this one.
I am developing a simple Android game using Java and libgdx. I want to make a typical ranking, a player who completes a level is awarded some points, and his score is compared with other players who sent theirs. This is all ok (well I still need to find a way to store players' scores). On the other hand, I may want my project to be released as an open source project, so others can look at its code freely. My question is, if anybody can get this code, modify it in order to get some advantatge, compile this game, and load it onto an Android device, how can I stop him/her from sending his/her score? It would by unfair to let them send highscores with a different game.