lovely use of colors seen as its done by hand
OK, things that are annoying me, there's a white line top left... the clouds seem a silly shape and don't make any sense due to the nature of the black background with blue glowing floor plates, and the rabbits seem a bit random...
however, you have done a lovely job on the coloring aspect of things, the metallic effect is very nice indeed... might need to work on proportions as well as angles of things... like the wing on the right side of the picture, it doesn't seem to be the right angle, and the hand on the floor looks fat... good luck