wonderful work man seriously this is the best manip u made so far in my opinion...

the positives:
the focus here is really fresh...instead of making the horizon straight as usual u bended it a little from both sides giving it a nice surreal effect that puts u in a strange beautiful mood...
the color tone is really nice and the model fits right in it...
and i love those little doors that goes through till the far side of the photo...and u took care of little details such as the strings between is weaved from her dress...an awesome touch...and the little hearts is not just sticking to the doors...they have like a little hanging knob or chain and am not sure but i think the key in her hand opens those hearts cuz i can see a key hole inside....
also i love that girl standing so far holding what appears to be a heart in her hand...
and the model is beautiful...nice choice! plus i can see the work u did on her skin and dress and lights\shadows on her and beneath her....

the negatives:
the girl is supposed to be the center of the artwork....that draws ur eyes immediately...but viewers could be distracted by that big huge white area in the sky...i know it was in the stock already and its really hard to get rid off but its huge and taking the attention from the model...
also the model hair looks like a veil...to little strands in it...its too smudged and blurry like its one piece....i can see some strands here and there but they r thick and few...it is doable without a tablet....very doable....
also the last door in the horizon....the string coming out of it is thick...its supposed to be really far....it could have been thinner...
one last thing is some dodging or white layers with low opacity on the left...is that sand carried by wind ? needed some more work...but its not that bad...
overall wonderful work...keep thinking outside the box bro...i can feel that u improved a lot