Look around the room

From Reddit Choose Your Own Adventure

As you look quickly around the room, you notice that her room has two doors, surprising since the room is at the top of the lighthouse. One door is the door you walked into, and the other door seems to be placed on an outside wall. You decide to open that door, and as you do, you see there is a staircase leading down to the rocky points of the ocean shoreline. The staircase seems precariously rickety, but it where could it lead? Do you...

Walk down the staircase

Go back into the room and leave through the first door