yes but if he submitted the image at 2x then you can't zoom out to 1x.
not bad, there are some sharp corners in a few spots (upper left corner of raised lid, lower left of lowered seat).
banding is evident in several places (rim of the seat, bottom of the actual structure, etc)
I can't quite make sense of the perspective, the flat bottom seems to imply a side-view that contradicts the angle at which we see the bowl, and the shape of the tank on the back is a bit muddled, perhaps differentiate further between the side and front of this structure.
the inside of the bowl itself seems excessively dark and the blue is too highly-saturated, imo.
adding another color or two for aa might not be a bad idea.