Download Crusher Balloons Free Unity.
IT DOES NOT WORK WITH UNITY 5 or HIGHER! Recommended Unity 4 Wanting a Mobile game? This package is an excellent project example of how to make a mobile game.
Also, its code is compatible with all platforms, from Android to Web.
Contains score system, star system, 45 levels easy to modify the values, survivor mode, save and load system, sounds, menu, scripts, unlock system, feedback animated.