For those wondering why Amber is talking: 1. It's not the first time 2. When I was talking with Psyguy, he told me that the first 4 or 5 strips he wrote involving Amber had her not talking, so it was a subconscious thing. Eventually, he just decided to let her speak.
Tiny Tower is an iPhone game where you build up new floors and get 'Bitizens' to move in to those floors. Periodically a Bitizen will get in the elevator in the lobby and ask you to move them up to their desired floor (eg, the 10th floor)