Bestiality is a good ideia, you could add a Wolf or something, if you prefer, a mythological creature, like a werewolf or centaur in a Greek structure, it would be very good. A mine with underground forest or something like that could make room for new creatures, like snakes or jaguars. In fact, I loved your game, I hope it prospers and develops, and that you don't give up on it. (I'm Brazilian and I used the translator, I hope it worked correctly)