I like the lift (what pieces did you use for the frame?!?)... but I must say, although it's called Stonewald, the Lenfald style consists of wood/stone combinations, and your wall, despite the highlights, looks a bit plain...
The details on the inner wall are amazing, the hut, the chests, the wheels look great... the wall itself, again, despite using different colours looks a bit plain...
The battlements could use some more details, or maybe
machicolations or other highlights (maybe a weapons cache or a small shelter for the wall guards)
The plain grassland on the outside is ok, it is customary to keep the area before the wall flat and simple - to provide as little cover as possible to the approaching enemies.