It has a lot of nice parts, but it's lacking a clear focus, IMO. I think it could have a stronger sense of light and atmosphere if you chose either the foreground or the waterfall as your focus, by putting the strongest value contrasts in either of the places and diminishing them in the other.
It's difficult to explain in words, so a picture might help. (I hope you don't mind me crudely tinkering with your work!)
I'd go for the foreground as the main focus, with a secondary focus on the light above the waterfall. This makes the waterfall look more mysterious: