Wow!! What a fantastic and terrifying being. I'll tell you what I think. Firstly, your technique is just wonderful and I can tell you are very skilled with pencil. You've also done a good job in making the monster more brightly coloured than the rest of the drawing. This grabs the viewer's attention and the picture has a focus and is not too crowded. You've also done extremely well on the body proportions and positioning. The way you did the pointing hand, for example, looks very interesting and cool and these things give an amazing impact.
Maybe this drawing did not come out exactly as you want it, though, and I can suggest some things for improvement. I think even though you did pretty well on the shading that you've used, a bit more shading can make this picture believable and realistic and you should maybe show more texture. These things will get you a 5 star on vision for sure.
I hope I helped!!