Hey XCali

I use all kinds of software - GIMP is in my toolbox too

The water is definitely an improvement. The hard edge of it is quite a lot les dominating than it was before. Have you tried using a layer mask and manually masking the edge on the mask?

If you don't know what I'm talking about just say

The trees are all quite similar, which is just a tiny bit distracting when the city itself should be the focal point, but that might just be the way you like them.

The hills do seem to be floating just a bit. That's because you have a shadow that goes right underneath them. Try adjusting the shadow or removing it (as long as that doesn't also remove the hill shading on the side of the hill) and see what you think?