An in-depth review of a two-episode anime seems like overkill, so I'll keep it short.
First: I know that reviewing the quality of the file/subbing is frowned upon, but there is only one English file, so it's kind of hard to get around.
These files, especially the second episode, have some of the worst video quality I've ever seen. Taken straight from VHS and overly compressed, it bleeds on bright scenes, has poor line quality, loses details, and even mosaics at random moments.
The anime itself is a lot like Dragon Half: the pacing, writing, and art is very similar. However, Dragon Half is vastly more refined and distinctly funnier. It almost feels like the same people made this anime first, figured out what they were doing wrong, and punched it up a few notches for Dragon Half.
I can't say for sure the animation is a "5". It could be anything from a "3" to a "7" - the file quality is too poor to tell.
I don't regret watching it, but I have an extremely high tolerance for poor graphics quality. The anime itself isn't poor: it's just kind of mediocre and unpolished.