Referring to rule 1. Games must be family friendly (no language, adult content, politics/divisive topics, etc.).
My idea for an RPG Maker story is this;
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A mermaid that looks like a seal comes into a new town of ocean creatures. Nobody believes they are a mermaid, and question the validity of their mermaidhood. "You're not dressed with clamshells like a mermaid." "You don't have any pearl jewelry like a mermaid." "Can you even sing like a mermaid?"
But a mantis shrimp who is a bit of an outsider hadn't even heard of a mermaid before, and wonders if they might also be a mermaid. So the two of them set off to collect the items that they might become real mermaids in the eyes of the townsfolk.
After collecting the final item, a page of merfolk sheet music, the mermaid that looks like a seal sings the song to the mermaid statue south of town. A hermit crab overhears them and tells them about a colony of mermaids that moved to warmer waters in the south. To get there they have to pass the trecherous abyss.
Before they embark, the mantis shrimp confesses that after thinking it over and trying it out, they are not in fact a mermaid. They're a mantis shrimp. But they still want to journey together. And so they head through the abyss.
Near the other side of the abyss, the mermaid (who looks like a seal) saves the mantis shrimp from danger, and in the process their pearls and shells get all scratched up and dirtied. But they both make it out to the mermaid colony.
The merfolk accept them unconditionally with open arms, and recognize that the mermaid who looks like a seal is in fact a mermaid. The merfolk offer to fix up the shells and pearls, but also state that our heroes are welcome even without them. They further state that all manner of underwater creatures live happily with them, and they hope even more would come join them as there's plenty of room in the ocean. Everybody's happy. The End.
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I don't think I have to say that it's a pro-inclusivity statement. My take on Confused Animals was to twist it so that on first glance it seems like the protagonist is a confused seal leading a mantis shrimp astray, it is in fact the townsfolk who are confused in thinking they get to decide who is or isn't what they say they are. And the mantis shrimp who is confused about their identity at first comes to clarity on their own terms.
My inspiration and motivation for wanting to make this certainly comes from thinking about identity in terms of gender and sexuality, but no such specific language would be used in the game. I would like to make it broad enough of a positive message that people would be able to think of it in other terms like nationality, ethnicity, or religion if that rings more true for them, but also make it wholesome enough that I could think of it as a children's picture book.
Still, I'm effectively trying to say Trans Rights without actually saying it. Is that too political or divisive to fit the rules of the game jam?