The anatomy is a bit clunky in places (the (our) left shoulder seems to be longer than the right shoulder and the shading has room for some improvement in places, but over all, it has a lot of potential. I like what you've done with the black outlines. They work very well together with the vibrant colours and give the whole image a cartoony feel. Good job.
I too like the bold outlines and colours used, keep it up!