Sweet, I thought it was depth-less almost. didnt try to add any. Iv never been too good with depth...
v1 is hot. Get rid of the soft brushing behind the render, it looks a bit weird right now. Add a foreground light source, there isn't one right now.
Alright so tried it and changed and added some things. I think it needs less lightening now, ill fix that later.
You've over-sharpened it to the left of the render. The newest version is the worst with the bunch, just keep editing v1, the colors were a lot better then. And yeah, the lighting is way too much now.