This guy is fun. I love his little wings and big ears. If you wanted to take this to the next level. Try playing with dynamic shapes. Kill the symmetry and find the flow through the pose. This will give him more personality and energy.

Very clean

Great pose! I really like how his little feet are sticking out, very cute. the right foot feels like it's coming out of the tail a bit so maybe you could extend the end of the tail out a bit to separate them?

I dig your lines and how you drew the eyes. You probably want to fill in the values more. This will make the illusion of 3d form more convincing. You can get into fancy textures later, but for now. For this assignment, you want flat, confident shapes that communicate the planes of the form.