Merge down the layers and apply after that a prepared brush that can be downloaded here: http://www.deviantart.com/deviation/9890582/
?qo=65&q=by%3Alarafairie-stock&qh=sort%3Atime+-in%3Ascraps.

It is necessary for drawing the moon.



Merge down again all the layers (shift+ctrl+e) and get to the window Filter ? Liquify (shift+ctrl+x) to use Bloat Tool for distorting a little the castle (the instrument must be applied with short pointed motions).



Represent on a new layer now a rounded element, using the Elliptical Marquee Tool and clicking on the shift button, paint it partially, selecting the Gradient Tool.



Change the layer's type on Overlay:



Draw the same way one more circle, but this time it should be smaller: