If she is intended to be a filly, the head is too small.
Also, the snout is shaded like a nose (don't do that, ever).
Also, the lower lip is pronounced — this should be avoided until you study how to draw (human) mouths and thus learn when lower lip sticking out will actually be appealing.
Also, the shading has multiple conflicting light sources. The furniture is lit from above and to the left (as per original image having a window there), Bloom's body is lit from the front (a.k.a. from the camera, don't do that until you learn different ways to shade — it looks unappealing most of the time), her legs are lit from above, her face is lit from the front too except for the "nose" and the lip, which behave like they're lit from above, the bow looks like it's lit with something placed directly on the middle of the curve, and the tail has a dark spot and two lit ones in the middle, suggesting a "two humps" shape to it, except the lines do not follow that.
Also, she has a lazy eye (one eye is barely touching the bottom edge, while the other is covered by it — avoid having this mismatch unless you're drawing Derpy). And is looking above the viewer rather than at him.