Your rendering seems flat and what you could do is use shadows and light to bring out the form of the character. Feedback art; With this I added a dark background and brought a light source from the left. Tip, don't make your character's colour similar to the background else it will not stand out. Also, I added reds to the skin to make the character seem like she has blood and I added a bit more blush on her cheeks and nose. Hope it helped | Artwod Feedback