Oooh, what a nice pairing, very cute!
I like the Scenario. The Background is matching the coloring pretty nice and the little blush on both faces is like the icing on the cake!
Now, to the hard part, lets see what bugged my eye:
The Shadows on the ground are much more dense/darker that the one on the Ponies. The Box and especially Fluttershy looks like floating in the Air.
Fluttershy's Mane and especially the Tail could use a lot more "volume", let it be fluffy! Pinkies mane maybe too, but not as much as Flutters.
The vanishing-point of the Box seems to be not right aligned, compared to the horizontal joist in the background.
And one more thing, Fluttershy's front legs are not "in the right order" with the hint legs, it looks like She placed both front legs to the left of the hint legs, i would assume they should be rather in-between the hint legs.
And please, ignore the Star-rating, most stupid "feature" ever. I hate to rate something...