I agree with the other comments about how the end is very sudden. was confused and didn't unlock everything yet.
Also I feel that there needs to be a better balance between party size upgrade and recruiting cost upgrade. There were so many party size upgrades once you get further along that I barely used them bc the recruiting cost was so high.
And are the gems not part of the demo? I thought that maybe the buildings would give me gems but no. I didn't find any in the mines either.
Really fun game though!