Hey! Yes, animals is one of the next features we're going to work on. It's becoming an inside joke within the dev team, since "adding animals soon" has been said for a long time. However, it is definitely one of three next big features that we will work on.
Team games are already implemented! In the multiplayer lobby, select different teams. You can even play FFA (4 players against each other). When you create a game, pick large map that supports up to 4 players.