I guess Purple Pineapple still wins, then, unless PYP objects. (Pardon me for not making a complicated and horribly overdramatized buildup to that statement.) While the level was (deliberately) butt-ugly, it at least actually had a puzzle element in it, though not much of one.
yohji's wasn't really a puzzle, just trial-and-error with shifts.
Klamrisk's entry was by far the most interesting, and it actually had one real, reasonably difficult puzzle! Unfortunately, it was, y'know, one day late, so I can't give it the prize.