The lines seem to be very precise, and where you wanted them to be, and the colors are vibrant, blended well. Also the lighting is all coming from the correct position which makes the color stand out a bit more which is good, and attracts the eye. The background seems to fit the setting considering what "The World" actually is. But the shadow although it is on a wall it's a binary wall which should mean there should be no shadow, or a very opaque one at that. Other than this being fan art everything about it is very original considering this is in your style. Your technique is always nearly flawless. Considering what happened to her this deviation had a great impact on me. Overall I give a 4.5/5 great job on making this aesthetically pleasing, and I hope to see more of you art.
I think you pretty much got it down. The only thing that seems a bit off is the bottom portion of the face (from the nose down). It feels like there is much detail going on everywhere except in that area, making it stand out as something a bit un-detailed. Other than that, it's great!