snakes eat beans a game design, the basic requirements (regimen) (1) control of...

代码说明：

游蛇吃豆游戏设计 一、 基本要求（必做） （1）键盘控制改变游蛇运动方向。 （2）碰到边框或栅栏游戏结束。 （3）吃掉豆子蛇身变长 （4）豆子全部吃光，游戏结束。 -snakes eat beans a game design, the basic requirements (regimen) (1) control of the keyboard to change snakes directions. (2) encounter frame or fence the end of the game. (3) eat the beans Snake-Body variable length (4) beans all gone, the end of the game.