Hi there, I don't really feel qualified enough to give ratings, but I have noticed when zooming in that the thumb free edge looks quite thick. Sorry I know you asked for critique on the smiles and art, but I just had to tell you this as it popped right out at me iykwim.
Your smiles are very good, the pinkie looks like it need tweaking but it could be the camera angle.
Just one more comment sorry, the sidewalls could be taken in a bit, this will make your white tip look nice and sleek. It's not a big deal, just go back in with your file and straighten them up, won't take 5 mins!
Other than this I think you've done very well. What did you use for the art? Is it black gel?