No, you haven't missed anything. It's really just a matter of clicking and then dragging to the location and clicking again to place it. I had planned much more, but unfortunately I didn't finish and had to cut 50%. eg: Enemies, Dungeon and a much larger world. There are actually also several types of trees, stones and all characters have 4 weapons. But murphy's law came around the corner with a flu and other things. Nevertheless I am satisfied.
My goal was to participate in a jam again after 5 years and just deliver, even if it is not finished or good. :)
Thank you for playing.