for only 3 hours this is absolutely fantastic, and honestly the simple characters could just as easily been a stylistic choice, rather than a practical time saving one: the simplicity and lack of colour (for the most part) really alienates the characters from their environment; and one can sometimes feel alienated from the outside when in grief: so it adds to the effect.
I would've rated this higher but I didn't like the part with the wolf: I would have liked it more if you saw only the wolf's shadow, or the wolf was in the same style as the mother and child. Having the wolf turn up looking like that took me out of it, how different the wolf's style is from the baby's.