On par with Brackenwood with fewer artistic assets
This movie manages to convey a lot of mystery and wonder. In that, it reminds me of the earlier Brackenwood films, as well as the Hitchhiker series, also by Adam Phillips.
Interesting things to note: It uses music sparingly; it presents a bunch of characters and settings without, seemingly, any intention of an overarching theme or narrative. We get the feeling that we're being presented with some kind of naturally-occurring, everyday scene in a strange world, like this is a fishbowl and we're looking at the fish inside it interact with the little miniature sunken ships and divers.
That seems to be the point of it, in fact, and that is not something I mind. It's a fun and interesting diversion; I hope that potential for piquing interest continues in later games.