Yihha! Well, Roast Hog medal is achieved by waiting in the room which is before the last room... There is a Hedgehog from the Launch Hedgehog game flying into the Earth Orbit and burning to crisps... LOL...
Papers are pretty easy to get - watch your map - count the ways from the room you currentky in. If there are more exits on the map then the doors you see... Well, that means some doors are invisible. There is a total of 3 invisible doors - one in the second "Deja VU" room, one in the "Old-school platformer" and one in the room with the explanation about hidden doors. To get the papers you should first visit all the rooms and gather all the keys... Otherwise the door-platform won't appear in the needed place...