All of these could use some work and touching up, so I've written some comments beneath each one telling what I would fix. I know, I'm hard on myself.

Probably just overall better blending of the Moon and sky.

Making the colors match more. Using neater handwriting, and straighter handwriting. The brown on Peter Pan be more spread out and even.

Use better blending and proportions.

(this one is turned on its side btw. She's supposed to be upside down.) I had a lot of trouble making her arms. And better blending with the background.

More coloring and better facial features.

(this one is also on its side) the neck is too skinny and better blending of the background.

The rose needs to be bigger and the glass case needs to have better shape.

What Ireally want to know is if you would ever buy these. Or if they are just overall good quality. And any tips on making them better would-be great! Thank you! 😄