The only thing I’ll say is that your line work is a little rough. But hey, that takes a while to master, either with pixel art or with drawing.
The animation aspect of this, however, is awesome! I love the concept, and what you did with the words around the head. The animation is also really smooth! I noticed your use of smear frames with the eye movement, that’s a nice touch! I can tell you’ve had a lot of practice with animation.
Don’t be discouraged if your art isn’t turning out how you’d like. Keep practicing, and you’ll figure things out with time. :)