(Sorry about the last message, my browser went berserk and send it halfway through. Here's the finished one)
Hello Hunited, just to let you know. We know no mercy around here...Just kidding!
Let me try to help you a bit.
First let me tell you some positive things about your art.
-Your concept is nice, the creature is strange, menacing and sort of disgusting.
-The bubbles have some good and bold shapes.
-Your lines are carefully placed and you avoided banding for the most part.
-Nice details on all the goo stuff going upward.
And some things I would make different:
-You lights are always near the edges of the forms, try to bring them inside the forms(If your light permits it)
-Your Little bear's tones have no shift in hue, I would change it a bit between values.
-To make the creature more menacing i would pose it in a more ferocious way, bending forward in an arch.(I did one very quickly, i'll add it at the bottom)
Here's some notes:

Here's a slight paint over with just some color changes and light:

And here is how i would make the pose different(I did not have the time to remake it properly so i had to cut the ribs):

This is some pretty neat pixelwork, keep it up.