Game plays fine , some decent ideas here and there but overall the animations are lacking , it's the same 4 poses you're going to see over and over , you can try to find new stuff by playing & exploring for several hours but it's got the classic :"do a task , go to sleep to reset your status & repeat" gameplay loop which is kinda boring after a while.
So yeah , additional poses can be unlocked but they aren't that relevant to the main gameplay loop and you'll likely get bored before achieving anyhting.
There's no real story mission to speak of so you might as well play wildlife