first, TPT has nothing to do, shares no code with, and wasn't even created by the person who made powder game.
So we can't just add the birds and the bees into tpt by copying the code, we would basically have to add new stickmen type things (very ugly in the code and complicated) and then ai's for them (figh is very simple ... barely even an ai), and that won't EVER happen. Even if someone made a mod with birds and fish and ants and stuff ... I don't know if I would want it in. Anyone with the ability to add that is just going to work on something more useful.
Also I might try making stickmen less glitchy sometime but it isn't too important to me.