Portrait Painting Canvas

Here is a painting a finished this morning of my son.  This is a portrait painting using acrylic colors on canvas.  I really like the way it turned out--but there are some areas that need word.  The lips are sticking out to me like a sore thumb, and not sure why.  This is my 3rd painting and 1st portrait.  Any comments, hints, or tips are greatly appreciated.

For some reason my kids think he looks like a grown up in this painting but I don't see it.

Superman Painting

A little while back I wrote about painting, I love to paint.  I have never really tried to paint anything but have always been interested in painting.  I decided to pick Superman and try to mimic a picture I found.  It turned out really great, a few glitches here and there but I was overall excited to see the finished project.  Now I am not sure what to do with it.  Put in sons room or giveaway to someone.  So, what do you think about my painting skills?