Why did you make the second sun more round in the sunset? Being so low, it ought to be elliptical: https://en.wikipedia.org/wiki/Atmospheric_refraction
Also, I’m not sure the red Artoo recolor is a good idea. I know why you’ve done it, but it looks so similar to Artoo (because, of course, it is) that it’s really distracting. Better to allow the viewer’s eye to focus where it ought (Luke & Obiwan) than to fix a minor issue.