It looks beautiful
If this is going on your website, I still think it could use a once over, mainly a quick colour update.
Perhaps try masking the whole foreground and mess around with exposure in photoshop or something just to up the brightness a bit.
This should take like 5 minutes and I'd suggest duplicating the layer each time you try some changes then flick through the layers to compare which had the best balance.
You might need to up the closest mountains slightly too so it all gels.
The tree on left looks "nice" but any artist looking at ur website will probably judge it by its lack of clear light source. You could define the clumps by using magic wand (contiguous off) to select all the leaves, eyedrop the darkest green and start painting some dark areas crescent shapes.
Then u build up your other tones over the top.
Then do the same with the trunk, keeping in mind the top should be mostly in shadow, u can have some mid - tones there but the highlights look strange right now.
You could also redo the clusters in the tree leaves as the round shapes and pillow shading makes them look like puffy balls.
Try not actually rendering every every leaf, rather make each leaf a solid shape of green. Don't stress if every leaf isn't defined from the rest of the clump as this can actually look good, then u can go back and sparingly add single pixel shadows and the odd highlight.
This is less important as it's more like pixel artists that would notice that sort of thing.
EDIT:
I really should be studying so messy rush job (no Wacom available :-S) with lots of balancing and hues to fix.
Just wanted to give some ideas to create more "wow factor", especially if this is to go on your site.
