I know this is a demo but the game could definitely use a proper tutorial to explain not only battle mechanics but also some lore about this wonderful world, there is a lot of things that caught my attention like the color changing in the world and the variety of colorful (heh) NPCs but there is hardly any interaction with the world and it was kind of disappointing.
Another thing I really enjoyed is that I think this is the first RPGmaker game where I actually use the items in my inventory instead of just hoarding them, not only that but the items are also very creatively named just like the great variety of enemies you encounter, it keeps the game fresh.
I really liked all the characters (except Mariposa!) and can't wait for the full release.
Keep up the good work!