I like the composition very much and it looks like you might have used a star filter..great job! In my humble opinion, however, I think a noise reduction pass over would help with the graininess here, but that's my only suggestion!
"The artist is a receptacle for emotions that come from all over the place; from the sky, from the earth, from a scrap of paper, from a passing shape, from a spider’s web." Pablo Picasso
Well done.