The budgets must be minuscule. If a Hollywood movie produced added entertainment compared to this movie that was proportionate to the additional funds spent, we'd be in 7th heaven from its movies. But diminishing returns set in very quickly.
These movies resemble noir in b/w moody photography and feeling of danger, but they're not. The resemblance is via the expressionist techniques and the feeling of things beyond our grasp that intimidate the principals.
This one is excellent horror/fantasy sci-fi chock full of expressionist mise-en-scene. It's done as a silent b/w movie with intertitles and 20s makeup. Music is very fitting. The mysterious feeling is maintained throughout. It reminds me of Vampyr (1932), which is a super movie. Echoes of Caligari too. The sets become very creative at the climax.
This was a lot of fun to watch.