Put quite simply? an over used idea….RPG . And not just any RPG, but a classic final fantasy styled experience.
Seriously. But instead of remaining serious continuously the character can be absurd with absurd weapons! Who doesn’t want a main character whose weapon of choice is a stuffed animal? If I can get a team together I’d run the modeling to the best of my ability.
But right now for the proposal I suggest a set demo like experience complete with dialog, and possibly ambiance music, combat music. And to simplify the job for anyone who codes this set encounter points. 1 or 2 spells whatever. This game/demo may be short but it could be a decent experience so far.