Much better! You've built up a good sense of depth now. Good use of dithering to squeeze an extra dark brown out of your colours, too. Dithering works great when it has enough room to appear like solid colour coverage.
I would critique how none of the rocks seem to have volume (they have details, but no form shadows of their own), but I think with how you've done it so far, adding shadows would just make things too busy-looking, what you have now works well :]