I think that the mountains are a bit overly blurred. The thing with atmospheric perspective is that it creates a ... duller colored object [i'm blanking on a more appropriate adjective], but the edges of the objects are still defined, to an extent. Granted, they are somewhat unclear, but there is still a clear edge.
>.> I don't know if you get what I'm trying to say, but I hope it helps?
And I love the flower. =D