5231 was what I tried, since there are 5 birds, 2 lions, 3 whales, and a singular ???? in the book.
Outside of what I mentioned there isn't really anything else I noticed bug-wise, though it'd be cool if the player stopped walking when they interact with an object (very nitpicky but hey while we're giving feedback).
I'd love to play a version where you've quickly fixed these two bugs though, hit me up on discord when you've managed to fix these and I'd be down to give more feedback on further points in the game!