Nothing to be sorry about, this thread could use more constructive criticism. It just needs to be accompanied with the constructive part. Tight linesThe shrimp's tail extending over the eye of the hook and the amount of body hackle are the things I see that would cause it to spin. Yes - the material out the back of the fly will help stabilize it but much of it is below the hook shank which is considered the axis the fly is balanced around. The shell back on top of the hook may also want to rotate below the hook shank.
Sorry! Just my opinion.