贪吃蛇游戏是一种老少皆宜的经典游戏，贪吃蛇游戏的基本规则：通过按键盘上、下、左、右键来控制蛇运行的方向，当蛇将食物吃了后身体长度自动增加，当蛇撞墙或吃到自身则蛇死。-Snake game is a classic game for young and old, basic rules of snake game: through the keyboard up, down, left and right to control the direction of the snake run, whe