Great color and composition. If I could be just a teenie bit picky, I would like to see just a bit more of the bench top. Actually the effect I'm seeing is probably a limitation of the monitor I'm viewing on - the print probably makes the bench stand out more clearly.
I agree. The bench needs to come up on the wall so there's contrast in the background. The cobblestones and the bench top are too close to the same color and the lateral line of the bench is directly over the lateral line of the bottom of the wall. The bench gets lost. Really good try, though. As Dale said the color is excellent. Were the cobblestones actually purple? If not, you might try clicking a cobblestone with the middle-gray dropper in curves or levels and see if that separates the bench top from the stones.