Okay, this is not the first time I saw a picture like this, so originality is down the toilet. But then there is the technique to make this cardboard art. The lines are not smooth in most places. The chair has no depth, it looks like the right arm of the chair is a 1/64th inch thick material. It also looks like the pony's left leg is hanging off the left side of the chair. I must say this though, the best part of this picture is the hair. You could use a lot of improvement and I hope you take these observations of your art and embrace them into future art.
wow, I don't have much to say but this is beautiful. you are as talented as ever! The only things i really see is that the neck seems kind short, though that may just be a style thing, and her side and haunch look a little wobbly as well as a teeny shift in her upper arm (the one farthest from us). Her arms seem to be uneven as well, but i'm not the best person to turn to for perspective and whatnot. My final thing to say is the shine on the hair looks a little grey-ish and doesn't fit, but it may just be the light heh. You did amazing as always, and you are an awe-aspiring artist. Keep up the good work, and I know you will!