After entering 80, you will see a red door with a figure. Click on the figure, and the dot on the figure will change from gray to green. At first, I thought that all the lines would turn green, and the back door would open, and then we would switch. I don't think it's all wrong. The most important thing is how to click the points to make them all green. The clue of this level is our one stroke game. I believe you all should have played a stroke game. In the difficult graphics should be a pass to be considered successful. So we have to figure out this figure in advance. I'll take it as a stroke: we mark the number from the top point. The first point in the first row, the second row has three points, which are 2.3.4, and the third row has three years, which are 5.6.7. And then we started planning for a connection. The last way to connect is 1325674621436. Finally, the door will open, and then show the green arrow, click to enter the next level.
After going in, we see a compass like switch on the door. You have to rotate all the way to face the red ball above. There should be skills in the rotation here, otherwise it will be like I'm stupid. So always click on the top left corner of the door, and then point all the openings to the red ball. Finally, the red ball will fall down. After putting all the openings down on the green button, the door will open to reveal the green button. After clicking, you will enter the next level.
In the middle of the back door is the river. On the left side of the door are goats, big gray wolves and Chinese cabbage. We're going to transport them across the river bank, and the door will open. But here we should pay attention to that goats can't be put together with Chinese cabbage, and goats can't be with big gray wolf, so we first transport the goats across the river, then we transport the wolves, and then we transport the sheep back, and then we transport the cabbage. After we transport the sheep, we open the back door and click the green button to enter the next level.