Chris this is very simplistic as your words describe-but that's what makes it appealing to me. I think it's a very good composition and I like the strong blue color of the rock! I bet it would look cool if you did a 180 degree flip on it.
Now, see, I would have done a 90 degree turn counterclockwise...
Chris this is really a powerful image. There's just something about simplicity that makes for a striking photograph. I'd print and hang this one if I was you.