I am stuck at the fireplace level

[pievauja]

Hey. I can't find something to open Green doors in the Fireplcae lev.1... it's hopeless,I re-did level,but still doors are closed and no key or smth else to open is visible. How the heck do I open them?

[Shadow]

There are spoilers below. To see them highlight the area to the right of the spoiler you wish to see.

Spoiler 1: You need to find the secret area.

Spoiler 2: Once you have explored all of the main area, look at the map, what does it look like, which piece is missing?

Spoiler 3: The secret area is in the south east corner.