My my, what qualifies for NG's best these days.
I actually liked this, if for the nostalgia. It's short, as you mentioned, but that's no excuse for the reviewer NOT calling it to mind.
People who vote 10s because it "REMINDS ME OF THOSE GAMES I PLAYED" are idiots.
The animation is minimal at best. I liked the little Shiggy sprite changes, but overall, the animations were kept to a simple 3-7 frame (if at that) scheme. It was really just a slide-show, with some sprites, with some music I didn't care for, with some plot I didn't care about, with some concept that (in variation) has been done 5 million times [insert hyperbole].
Not the worst I've seen, but this is easily a 3.5-3.75 flash, at best.
The presentation is smooth, the whole thing jives well--- but the concept, actual depth of animation, story, etc is very shallow.