Generally quite cool, only played level 1 so far.
I'd really like it if the witch and the pixie would show the direction / cell they would move towards next. That would really help in planning ahead and trying to manipulate them properly. As is it sometimes feels rather random.
Also at some point when the pixie was locked in it teleported to the other side, starting to mix up flowers and trees which significantly increased the difficulty. This happened even though there were closer free cells on their own starting sides.