You should add the link in the creation itself, not in the comments section. Use the "edit" option to add it.
I'll go ahead and judge this anyway... 18 points. 3 points for build quality, 5 points for originality, 2 points for theme adherence, 5 points for purism, 3 points for presentation.
Hey Mars, nice entries, but for them to be judged they have to include links to the contest page and you must post links to these entries in the "entries" thread. Thanks!