I have been playing for a 2 week. So impressed and nice gameplay. However I hope it will be more interesting when more interaction in game such as, more guests come to the zoo and go nearly all of the zoo, now it just 5-6 guests go around the in front gate although my zoo is big, so bored ; moreover if the guests can use the zoo facilities like sit on chair, go to the toilet, buying, taking photo, ... which make us see that what we build is contribute to the zoo. I rate 4 stars