I love the complimenting colors and how they're layered. I wish I could see more of what she were doing. I associate that position with cell phone texting, heh.
I think the photo as a whole is just a tad over-sharpened. I'd imagine you were trying to get the subject sharper, but with the limitations of Basic, you couldn't just single her out. The smaller rocks along the shore look a bit busy and pixelated with the sharpening. It might also be caused by the compression to JPG.
The centered composition certainly works for this photo.
Very complex lines with some strong saturation. I'm actually enjoying that! I like the two toned feel with a nice sugject to break it up. It works well IMO. nice job.