It looks good, but I agree somewhat with Panda. If you have a REASON for having the effects, then it's all good. But if it's just spontaneous "this town is very sunny!" it might be distracting instead. Maybe if a particular town that is particularly splendid or something had it, it could be used to enhance the... rich, golden atmosphere in that town. It'd be pretty neat to have several different effects to use in different types of town, in fact. If one town has sad events going on, you could have, like, overlaying shadows of clouds floating by or something. Mmm... Butterflies and birds could also be used in the same way, to increase the beautiful peacefulness in one particularly peaceful town...
But again, if it doesn't have a reason to be there aside from "it looks good", I don't think it should be.