A Fat Goomba...

[Bear Saxaphone]

Good start, but you need to fix a lot. First things first, the colors. I'm not a huge fan of the orangish brown your using. And you need more contrast between shades, there hard to tell apart. Then smooth out the line art, like said above, its very jagged. Then you need to fix the angle of some of the body parts. The mouth should be titled to the right, and the body and feet should also tilt to the right.