I own a Motorola Razr that's on the latest version of Android, and like everyone else in the comments right now, I can't download this on my phone because it apparently was made on an older version of Android...despite the fact that I didn't had this problem with the first game.
Hopefully this gets fixed soon, because I don't want to accidentally risk it.
EDIT: I'm a bit of a dummy...I just noticed the instructions mentioned that this would happen. Still, it will probably be good to try and fix this issue.