Really charming game and overall fantastic job! The visuals are great and the music fits perfectly. For the specific question you asked, I lean towards saying more challenges with existing characters because for the most part, only characters like the forager really shake up the gameplay is a meaningful way. Whereas new challenges/maps are always a fresh addition. An additional note I would say is that the flags outside of the houses are fairly small, I think a better way to show clan houses would be to change the color of the roof so it is more immediately noticeable. I would also add a unique icon or appearance as well just to help with any color blind people.