Button was ignoring player moving off the button if they left the
shell before doing so. Now, a custom near-like sensor is used
instead.
Fixed unplesant camera movement at the end of the game.

The camera was being reset at the end of the bird conversation -
when actually the game was ending, and transitioning to the
credit sequence. Just going to the credits without changing the
camera is more pleasant.
Added camera movement to suggest which way to go in ant conv.

Camera now looks up a little bit when the ant speaks about going
further up the tree.
Made one section of ant conversation shorter.

It feels more natural now. Previously it didn't match the length
of the text, so it felt like a dubbed foreign film.