I love the mood so far. Usually I'd advocate for less noisy detail but in this case I don't want to take away from this mood, it's kind of like, grainy, low-light vision. At first I thought that was an rough stand-in for some lightning falling from the sky but now I realize that's another tree's bright bits.
Here's my construction recommendations: give the sky more space, if you can change your canvas size, that is. Let the sky and its flatness give some contrast to the intensely grainy trees and foliage. Perhaps some subtle clouds, but challenge yourself! Don't necessarily go for cartoony fluffy clouds, go on google image search and look at some hazy moonlit clouds and see if you can convey them with your skills in the pixel medium.
I can't talk about this as a composition more than that until you've largely got everything in place and evenly rendered, sadly. This is because you started at the left corner and rendered fully, you didn't go general to specific for the whole piece from the ground up. So, I'll wait for you to do the other half and then we can talk about composition a bit more. But I love it so far, well done!