It’s extremely pretty, indeed!
Once one has a circle of defenders, I did not really know how to spend the time waiting for upgrade opportunities. (Likely, re-assigning the defenders would have made sense… But I did not sufficiently understand the movement patterns of the attackers, nor did I have the imagination to picture the defenders range before placement; so, I felt that I would not really gain any efficiency this way.) I probably slacked too much, marveling at the music and graphics … ;) … Some stuff to pick up might be fun?