i know where is the secret room.
first while talking to that ghost or whatever,just press space(must all be the first option),next when you're in the town go up,and then enter the right shop,and when you enter you will see a picture on the upper right,keep pressing space on that picture till you have that picture(don't press the red button),then keep playing until you reach mort's castle,when you are in his castle,you will see a paper shredder,press space on it,and then you will be in a secret room,while in the secret room,there is a person and he will skip the rest of the game to the ending.that's all,finish.:).