When you pass a level on your first try, you are rewarded with a Golden Pin for the level, visible in the map screen on any level you pass with a first try.
You'll even see a lovely golden crown will be perched on the level icon! How regal!
These Golden Pins are the rewards for passing a level on your first attempt and give you unique bragging rights when comparing them against your fellow friends and family who also play.
So open your maps and compare the golden glory between your games!