Bad game. After hours of playing, I thought I was too stupid, so I decided to hack the game to find all the passwords, by the way, the first password is 1220. I don't know how to find it and other passwords without hacks.
As a result, I could not complete the game, since I could not find where to spend the remaining keys.
Hack file (move to countryside_data -> Managed) ( infinity super flashlight + super speed + any password agreed)