Your stuff is brilliant!!
I don't understand why your stuff have so a low score when, your designs are really nice to look at and the colouring is great.
However the only thing that does bother me though is that there is an awful lot of white. I understand that these take place on the moon, but someone with your skills should be able to make a little more interesting and less empty.
I really enjoy your stuff and I hope you don't get discouraged by these really low scores(WHICH YOU SHOULDN'T HAVE).