It teaches how to build "skin-able" game elements that can be reused and modified for different projects, saving development time.
Implementing sound effects and building user interfaces like countdown timers and progress bars. Unity 3D Game Development by Example Beginners ...
Readers build four distinct casual-style games: a 3D keep-up game, a 2.5D catch game, a 2D memory card game using Unity's GUI, and a basic space shooter. It teaches how to build "skin-able" game elements