I can see you slowly evolving your systems and putting them together in unique ways. For this tech demo, there are refinements on old systems that you developed that will come in handy later.
Something to consider is using simple art styles to match the style of your RPG. Reducing colors and creating uniformity in the art can help create an identity and make production faster for animation and art assets.
I encourage you to continue exploring new art styles and building upon existing systems while experimenting with new ones