giants meeting

[Yanifska]

where's your original sketch? hard to judge without that. In my experience when you have a feeling that your original sketch was better, always go back to the original sketch no matter how much time you have already sunk in.
No amount of polishing a turd will make it gold. Go back to the nugget you found and polish that up properly. In general your piece ain't that bad; I would play with lower contrast on things that are meant to be really large...too much contrast implies things close to us, so apply this to the figures.

*edit: Ok wait, so the value sketch was your original you meant?  Well what I said still holds true I guess. Look at the contrast in your value sketch, compared to your colour version, more contrast, so the depth breaks a bit. 

I'm gonna also chuck this here to show how contrast and texture density is huge in implying distance and scale. Notice smaller lower contrast shapes in the distant figure, larger blocks of colour and shapes, higher contrast in the foreground. The far background has very little contrast except in key focal points, and is largely just shape and value.

thanks Amit, 
I was trying to do that, I guess I got carried away.
edit: could you be more specific about what should be improved in my piece ? You are talking about issues in the depth, that there is too much contrast in some places.
Are you suggesting that the scale of the textures isn't right, cause I am not sure how I could improve it. For example the grass on the fore ground is at a much larger scale than in the background.
I personally feel the city could use more clarity.