Green key can be seen only with the sharp vision)
In the Northeast corner, it does not indicate that you can go east. When we go east, it says, "Need security key."I have the green key.
That's as feature, not a bug =)
I've got five keys, too many things, so many possibilities and lots of places to go. Which doesn't make it easy.
Yeah, I understand that the game is a little bit hardcore. But it's a lot of narrative objects, it can help. And don't forget to draw a map =)
