Great tribute!
Very good job reinterpreting Lilium. The shadow possessing Lilium was a very good idea, and it is a legitimate interpretation of it (i think).
You did well changing the style, giving up the gothic stethics. But sadly, your drawing still has room for improvement (i am myself a terrible drawer ^_- but i am sure that if you work on it, you will soon improve greatly, and could even remake this ^_^). Also you introduced animations in the concept, but they are not too good (for example, when Lilium is walking and you focus on her feet, that animation is not too good).
Nevertheless, the music choice is truly great, and goes perfectly with the story. It is shocking seeing a "lilium" without the "Lilium" song, but your choice made up for it.
Please, keep on doing this ^_^