If you are still trying to get it, when you do the symbol in orders, it gives you a word. The traces of blood guives you letters.
Have a good play! (sorry for my bad english)
If you still don't get it, look at the stars when you clic on the pictures, it gives you the number and the intensity of the knock.
Have a good play ! (sorry for my bad english)
I can't run the game, it's says that there is a fatal error: Line:903. How can I run this game please ? Sorry for my english if it's bad.