This rather old movie, is definitely a masterpiece for it's era. Taking into consideration it's age, you simply can't attempt to compare it to mordern animes, by those standards it falls rather short. But, if you judge it according to the standards of the time it was made, you find a fast-paced filled with action and horror that can easily outmatch many horror movies, be it animated or acted.
You also find in it many aspects of horror, that are fairly common in movies and series following the same genere.
Although to tell the truth, the story had such a fast pace that all the critical scenes didn't have much impact; but at this point one can't do much about so it's best to enjoy it.
Visually, it obviously had a very old style of animation, but neverless it was quite appealing according to it's horror genere. Scenes were constanly repeated, but as a necessity rather as of laziness. So mamy chatacters, scenarios, and places were shown in this movie that is one can infer that they would have had a very hard time keeping up with it.
The music score, was just as old as the movie itself, but it sucessfully gave it the ambience needed for a a horror movie. Maybe not memorable, but rather enjoyable.
And as personal comment, I'm surprised that fanservice and panty shots were already present since then XD
