Why couldn't I use the knife I found in the other room to defend myself?
I was close to start drawing a map :) But then I thought the rooms order is random..
It's a bug that I did not had time to fix. However, in every room where you may need to use a knife - you can. You can't use it only in rooms with no enemies or in rooms where knife would be useless
Maybe I just wasn't fast enough to use it.