Nighty Night

I was playing with some brushes I got and ended up making something else in photoshop. I kind of was just messing around, so I'm not sure how I did some of it, like getting the clouds to only appear right under the moon. I mean, I know I had a layer that had overlay as a blending option, but that's about it. I really can not understand those blending options until I pick them. Critiques?

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