Surprise!

I like the contrast between the brightly colored present and the night-toned pony.
The outlines bring the whole whole thing popping, but that is contrasted with the fact that your lines on the lid and on the box do not converge to a single point. (your box lines go just past the corner of the page, while your lid lines go between half and midway down. Also your lid looks bent in at the bottom, (in that it faces the top of the lid), yet the edge is straight.
Shadowing might help with the 3d aspects.
The change of angle of the triangles presents a lot towards the 3d aspects of your piece.

I know, I'm being picky, but these points are what I'd want on mine.

The expression is quite potent, but I'm not sure how. . . is it a flirty one, or other. The lack of knowing may be part of the piece's appeal, so don't think that that's definitely a bad thing.

I hate the side bar star thing in that I don't always know about what your vision etc., are so how do I rate them. As above, I don't know what your intent with the expression are, and that there seems to be a lot of focus on it because of the eye-whites and long neck I cannot judge well your vision or the impact of said vision. [If there wasn't supposed to be a complicated look that would be a lower vision and impact] So take what advice from the stars that you need. and feel free to ask me about them as you wish.