I've not read this book but recently watched this with my toddler. Knowing it comes from the same place as Room on the Broom, and most recently, Zog, I was surprised that it had quite a downbeat tone. Essentially the plot sees Stick Man getting into bad situations, each one taking him further from home and into greater danger. I was surprised on watching that it wasn't lighthearted, it wasn't funny but that it played quite dark. Okay it has the rhyming dialogue that these type of things have, and the animation was rounded and likeable, but the material had that tone to it, and there weren't any laughs to break it up.
Reflecting back, it maybe played well for what it did, because it produced something based on danger and loss, but did it in this animated way that was easier to digest. I can imagine children being a bit saddened, before the magic of the end produces a happy ending, but they will not be overly frightened or threatened by it. My toddler understood the importance of Stick Man's family, and why his situation was bad, but she didn't get upset or bored by it - in this way I think the balance was good and the film's tone carried it off well. Not one of these films that I'll come back to loads, but an interesting change from the other BBC/Donaldson animations.