to open the coded door go to the room to the right and look on the second page a the newspaper reports past the coded door is the machine to beat the maching use the buttons on the bottom left and right of the screen to push the saw away be careful because sometimes they switch to get into the basement you need the doll from the machine and the doll from the glass mirror to get the doll out you must get the broomstick from the washroom to the left
upgrade till you get the secend to last barriarer the one that extends up and kinda looks like a ladder then upgrade the units till the last one do not build tunnel or chain tunnel does only 4 damage if you HAPPEN to get through and chain is useless