I have been playing for a couple of days now, and I am very impressed with this app. I have been looking for something like it for some time, and really didn't expect to find it in a mobile game. My favourite aspects are the way in which basic maintenance is integrated into the game, and the element of surprise when performing an experiment to create a new species/resident for the zoo. If I could alter anything, it would be the social media integration. I am also less than keen on having to place my stylus very specifically so as to avoid clicking on the cinema guy when collecting money from a concession stand. I am really enjoying the game.