Hi Spanerman,
Well, if im honest, it doesnt really look much like the picture above, sorry.
Its a difficult style/look to emulate, especially in such a small tank. My main observations are that your sand is too deep and could do with graded gravels and more attention to its position. Look at the inspiring picture, do you see how the sand has settled naturally, and forming the line of flow? You need to try and do that with this nano. Also, your rocks need better positioning, you want to make your eye lead up the sand and into your rocks. 'Lead in lines'.
The rocks you have chosen do not look that inspiring, you could change this by adding more, or positioning them better. At the moment you have place them in such a way to make a bridge with a bit if wood - This is not what the inspirational picture shows. You need a river bank, not a bridge I think.
Basically, there is not enough form in your hardscape to suggest it looks like the above picture. Study the picture and almost copy it the best you can, and you will have an over all more pleasing aquascape IMO.
I hope this helps Spanerman, its not a dig at your skills, just a gentle push in the right direction.
Cheers,
Graeme.