Scoring and posting scores to Apples Leaderboards
One aspect of making a simple indie game that feels incredibly relevant is the ability to examine how well one is playing and whether or not they are improving as the play your awesome Indie game. An obvious way to understand one improvement would be to add a scoring mechanism in your indie game. Not only including a score but also include a high score give your user a base level for which they can complete.
Everything about scoring
GameGorillaz.com