Unable to find the key to the crane

[xing_kong]

I have obtained the key to the crane, but I cannot find the place where it is used, where it is used, and the key to the butterfly room cannot be found either

[Ogre]

On the left side were the talisman is sticking out of the wall, that is a secret passage for the crane key. The butterfly key is a bonus item you buy from the tickets you get from the little mini games. It is a secret ending.