It is a very addiciting game...
However you need strict tutorials about what you need to do.
I liked this game and it is a good timesuck like the Sims. My guess is that is is populated with British celebrities than American. The game's success is how well you can breed the dogs.
This game has a draw and I like you didn't add other elements like buying toys, cleaning up after them, feeding them or taking them to the doctor. Maybe that would be for the sequel.
Hint: You can do a lot with the Amy Winehouse Runt and when you bred it gives you a lot of money.
I like this game and it will be my distraction for months.