This film was made completely using shadows from a pin screen, with Alexander Alexeieff working from the front and his wife Claire Parker working from the back [according to them this is how they worked]. The pin screen was Alexeieff's invention. A low-resolution product based on his screen can be found in novelty stores. It has pins that you can leave an imprint of your face or hand in. This product was inspired directly by the films.
This film itself has a lot of movement and action. It is difficult to describe. The story itself is kind of dream-like. Not surprising since the original story was the same AND it is difficult to tell a chronological scene using animation on a pin-screen [no doubt].
Alexeieff made other pin screen movies. They are also worth watching. Many colleges and film classes show the video or 16 millimeter film to film classes today.