Your pony looks great! I love what you did with the hair it looks really nice and natural. The cutie mark looks so original. I have never seen that cute cutie mark before. I can see you put a lot of effort and precision in that art. We can see there are small details. The shades really make the art more interesting to look at.i like the eyes of that pony.
And all I really have to say is that your color choices are just amazing. And the shadow behind the pony makes it look more real.
Your art just looks amazing keep at it!!
I'm not usually good at critics but in one word I think it's amazing