To start off, the sky is quite blank, it's just plain blue, which isn't bad, but I think you could do with some clouds. The mountains look a bit odd, the highlight color doesn't seem to go well with the other colors, but maybe it's just me. From the bushes up your color scheme is very warm, but then you have the bushes which are cool, and have a bluish outline.
What specifically is this for? And what are you aiming for?