This picture looks good at first glance, but when you look at it with more detail, you realize that there are a few areas to improve on. First off, it looks pretty dark. Lightening up the dark areas such as the rock and the sky would do a lot for this picture. Adding some more color to the rainbow and the ocean would enhance the picture as well. Lastly, brightening and adding some contrast to it would complete it. Overall, a good picture that, with a few minor improvements, could be a great picture.
This is what it could look like.