Beautifully done. I love how you made the foreground and background detailed and animated. It really adds to the beauty. It's very nicely animated, too, and the colors and lighting are pretty complex and they feel unified, nothing really seems misfit. The composition is dynamic and adds to the unity. The one complaint I have is that the rays of light shine through in a bit of a rapid rhythm that kinda offsets the chillness, but I know it must be super tough getting it all right and making it loop smoothly.
Happy Pixel Day and thanks for contributing!