I don't know what the level looks like so I have no way of knowing whether or not it fits well.
I do think that the foreground hills are a little too busy, maybe remove the noise, and blur it a little.
Also the highlights on the hills are a little jagged, try smoothing them out more.
It also seems a little flat, especially near the buildings, maybe give them more depth by shading, and changing the river from going straight down to a little more wavy.