This is actually pretty good looking - everything is relatively original and well constructed.
My only real suggestion right now, being a graphical one, is to do something about the sky and clouds; they contrast with the mountain layer greatly. The mountains are very faded because they're far away and are intended to blend towards the sky colour... but with the low hanging and bright clouds zooming all over the place, that effect is ruined. My suggestion would be to decrease the emphasis on the cloud movement, move them to the top of the screen, and make them a bit more subtle.