一个游戏框架的封装，虽然简单了一点，但窗口创建这些都装好。游戏框架被简化为，创建窗口，初始化游戏，游戏运行和清理三步-Framework of a game package, although a bit simple, but the window is created these are installed. Game framework is simplified to, create a window, initialize the game, the game is running a