Something which I've never done before, is animating leaves, turns out it is easy, just draw curved lines and paint a rotating leaf over them.
The game doesn't draw attention to it. In the same way that you never really question why Hollow Knight is full of bugs, it just makes sense within that universe. (Actual humans from Earth are a thing in this universe, and it's a major plot point that the main character is not human.) It's actually quite a serious and dark game. I wouldn't really call it a furry game IMO.