A very mezmorising piece that captures the attention with the extending/ shrinking extensions...the rotation is also mezmorising, but because it gives a sense of function and purpose the whole thing.
The coloring, I think, isn't bad but could be improved. Perhaps a brighter greenish hue for the area around the blue bubbles;
maybe a bright red to really bring out the bubble structures.
I wonder also if you could maybe include some lightning effect; a sunspot or two to give the image an even more three-dimensional feel to it; this is something glistening in the sunlight.
Fantastic work overall!