This is QUITE lovely. I wish the moon was so close in reality.
None of the stuff people have critiqued bothers me at allyou said it wasn't serious, I believe you, and it doesn't have to look "realistic" to be pretty. Good work.
The lighting on the moon needs some adjusting, and downsized - even a low moon isn't that big. That would also go for the sharpening, but that's been said before. Also, there's no real focal point to the image, it's very drifty - which is good, but it feels messy. A border would work wonders.