一个用MFC编写的简单的贪吃蛇游戏，游戏分5个等级，等级越高贪吃蛇移动速度越快并且蛇身体颜色也会相应的发生变化-Written with MFC simple Snake game, the game is divided into five levels, the higher the level of the Snake moving faster and snake body color will change