I like the color choice and the design 

 hehe yes, thank you!

 yeah I'm a little confused when it comes to shading outlines, but I'll look in too it haha.

thank you!

 Super cute! The muted color is very nice.

Is that an original character?  Its really great love the colors and style!  That red on the cheeks is so great!

looks best on a light colored background

I agree: just add one! If you can justify it (you do) it will be accepted. Just make sure it's thoughtful: canvas size and color should fit the piece best.

I like the style, but you need to work on these outlines and AA, like you did with the inner arm outlines.

 Adorable!

 D'awwwwwwww.