用上下左右控制蛇的方向，寻找吃的东西，每吃一口就能得到一定的积分，而且蛇的身子会越吃越长，身子越长玩的难度就越大，不能碰墙，也不能咬到自己的身体，等到了一定的分数，就能过关。(With the above and below the control direction of the snake, looking for something to eat, every mouthful can get some points, but the snake's body will eat more