I really liked the gameboy vibe. Took me back! :)
I found with the dialogue it was a wee bit of a sense of 'have I tried that yet?' and being in a series of loops that I just needed to untangle. Not 100% sure how you would address that without the dialog tree ballooning. Maybe adding another mini-game type to allow you to influence the direction of the dialog? Or maybe the character getting fed up with you and you need to go away to change how you look so they don't recognise you and dialog tree is somewhat different? e.g. you wear their favourite color, or a nice hat etc and that changes how they feel towards you... so earlier discussion can give you clearer tips as to how to approach to convince them...
The RPS mechanic fairly solid - although I think adding a count down timer before auto choosing the action selected would be cool. It would give more of a sense of not having as much control in that 'fight'.
Well done in get this solid game build for the jam. Very impressed and as you say you like the writing aspect of the game, hopefully you have some good reusable mechanics and functionality you can use in some future projects.