The colors are a bit washed and a bit overexposed. However, I know upload and conversion to jpeg can goof things up. On the other hand, maybe your were going for that bit of a washed look which is some photographers style.
For the above reasons I will just focus on composition. The distance behind her (photo right side) is larger than in front of her (photo left). Your subject also sits high in the photo. You need better placement on the thirds (if you're not familiar - study study study the rule of thirds). For these two reasons she seems crammed into the upper left side/corner. Here is your photo with the thirds overlaid.
View attachment 185991
With the thirds do you see how cramped it is on the left and open on the right.
Here is a photo crudely recomposed getting her in line with the thirds and her eye on the thirds intersection and the other eye on the third line.
View attachment 185992
A little more room in front of her so she's not crammed against the wall and the eye at a point of interest - thirds intersection.
Hope this helps. It's a great photo idea, but needs to be further polished.