Nice composition, great shot!
Well everybody else say's a 9 but I'm not sure why. Doesn't seem like the deck serves any purpose othr than to fill up space. The stair's may offer something but are hidden and the rock is, well that building is dead center the frame and the base of the rock. Not sure what I'd do different but think I'd look for a different angle. Maybe to the right and down allowing the stairs lead to the rock with the rock to the left more and what look's like a huge valley behind it, to the right.