I love your lines and color, it looks very natural! The spindly vines in the foreground look great too. The airbrushing in the background is a little distracting and I feel like it would have worked better as solid objects. Since its the only airbrushed thing in the the picture, it doesn't look far away, it looks out of place. The colors are perfect tho, and the lack of detail in the background works very well. Great work! The style makes me immediately interested in the characters, and its awesome.