Why you use game engines ……..
Gaming engines are software frameworks which provide/simplify repeated used features in games such as transitions, animations, sound, physics, flow control, text rendering, surface rendering etc. When we set out to create games, we want to focus more on the game logic, game experience and storyline … rather than dwelling on how to animate the tile across the screen. Examples of gaming engines include Adventure Game Studio (C++), Agate lib (.NET), Allegro (C), Cocos2D (Python) etc.
Cocos2d is an open source framework for building 2D games, demos, and other graphical/interactive applications. Originally developed using python, some of its main features(also supported by many other game engines) include :
Flow control : Manage the flow control between different scenes in an easy way
Sprites : Fast and easy sprites
Actions : Just tell sprites what you want them to do. Composable actions like move, rotate, scale and much more
Effects : Effects like waves, twirl, lens and much more
Other features include Tiled Maps, Transitions, Menus ,Text Rendering , OpenGL based and aBuilt-in Python Interpreter..