Hello! I hope you don't mind me painting over your sprite without your permission but this is an idea of how to improve it! :D
I'm not the best artist so bear with me but I think I got the idea across.
Here's what I've changed:
-Larger snout
-Changed a bit of anatomy (hand size, muscles, etc.)
-Clearer lines
-Longer beard on the front (suggests larger jaw)
-Increased hip size to match with torso (I'm not sure if this is needed)
-Eye size more matched/synced with eachother