Overall the characters are well drawn (there are a few pictures that are way behind the rest though, mostly while the demons introduces themself and the showdown duel) and voiced (four mp3 files seem to be missing though), the characters and texts are well written (but I would have prefered to have at least some choices, even if they would have affected only little of the story, even if it would have affected only a few sentences and reactions). Without any choices and with only one possible ending i can't say it's a game, but it's an entertaining visual novel for sure.
critic points: There were a few errors (something about missing mp3 files), some pictures are way behind the overall quality and no choices at all (at least one or two even when only affecting a few reactions would have been nice or to mention it beforehand).