This game is sooooo fun! I love it! It keeps me entertained for HOURS, unlike most games.
The idea is simple. Move the pets to the stations specified in the 'thought bubble' over their heads and click on the exclamation point. You can buy more stations, upgrade them, and buy things that will increase the customers patience. You can also buy more workers.
Another thing about the game, in order to make it more challenging, there are certain things they want you to accomplish every 'day'. Like, for example, earn 500 coins. If you do the challenge, it will give you coins.
There are also Pet Points, which you use to buy the workers. Sometimes, depending on the challenge, you can earn those. I have read some of the negative reviews for this game and most of them say you can't EARN Pet Points, only buy them. This is not true. If you click on 'Get more Pet Points' then click on 'Earn Pet Points' you can choose to either watch a video and earn 5 Pet Points, or sign up for Tapjoy and download and run certain apps for different amounts of Pet Points.
Overall, this game is wonderful. And if it starts to get slow or boring for you, in the bottom right corner of the game when you are in your store, serving people, you can change the speed from 1x, 2x, or 4x.
Have fun!