This is the kind of piece that looks good untill you really start looking, the color, the lights and the shadows are very good, altought i have the feeling that the lights could be brighter, but thats a personal taste.
The problem comes with the bodies, i want to believe that you planned to use a kind of up to down camera angle, but you really miss the point, the faces look like the camera is either in front of them or barely above them, menwhile the rest of the body looks like if the camera it's way above the characters, that gives them a really weird look, and make the feet unconfortable weird and small.
The girl's left leg it's twisted so weirdly that if she was human it will be broken, and her left hair wing, i can't tell how it's suposed to go, if it's over her shoulder, it's bend it, i have no idea.
The boy is so stiff, looks like if those boots where made of wood and he can't bend he's knees, he's left feet it's pointing in a way he could not stand for more than a few seconds, he's arms are way to long for he's body, and he's left arm it's in such an akward position that you cannot tell where it's come from, the left hand has fingers pointing on different directions so weirdly that i cannot tell if you just copy past the right hand twice.
I sincerely hope this is just an experiment on perspective because has to many flaws for a complete work, even on amateur level.