First of all, the contrast is beautiful. Though, I would enjoy a bit more yellow and orange in the painting, the left side especially. And as another artist said earlier, it looks like it has been made partially out of flowers. Beautiful flowers, but still. The brush size can be adjusted to thin the flowery bits.
You have amazing color sense. You understand what colors look more like art together, and which don't. That is a very good trait for any form of artist, sketch artist, painter, or digital artist. I'm glad the brush sizes vary, and it looks as though you slaved for days over this, very good.
As a recap, it is stunning. But I would like more hues of orange or yellow, especially in the left of the painting, mainly the part under the greenish-blue area. The brush can be adjusted to fix any flower-ishness.
** Reminder: These are my opinions and advice, it can be taken or left, depending upon the artist's decision. No offense meant.
Thank you so much for letting me critique this piece. Well done. Keep on doing what you do FarDareisMai!