说明：  贪吃蛇，用游戏把子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，不能咬到自己的身体，更不能咬自己的尾巴，等到了一定的分数，就能过关，然后继续玩下一关。
(Use the game handle to control the direction of the snake up, down, left and right, and look for food. You can get certain points for each bite. Moreover, the longer the snake's body is, the more difficult it is to play. You can't touch the wall, bite your body, or even bite your tail. When you get a certain score, you can pass the test, and then continue to play the next test.)