Your character no longer turns black at night on phones. On phones and tablets, the colour grading was darkening the shadows so much that your character and nearby props looked solid black after dark. Night still looks like night, but you can see yourself again.
Signing in on a phone fits on one screen. The sign-in card now shows every way in at once on a phone held sideways, with Play as guest right at the top, so there's no scrolling to find it.