Upside down I think the sphere part is messed up. It's a sphere after all. Rather than making it upside down, Why didn't you distort and zoom in a spherical way? Overall. Looks amazing but the big tree on the left seems unnatural because it's kinda close compared to the entire forest. I just think it supposed to look like a detailed tree than a giant bush. Or is it a specific tree like that?
Lightning is amazingly done btw