It's called Tapped Out , i.e. tap until you're tired! The reason that they don't have a "collect all" button is because you get THOSE people who have hundreds of brown houses (which I think is disgusting to look at) whereby if they did have a "collect all" button these people hit it every few minutes, which I think is unfair on those people who actually tap all of the buildings/characters individually. Also, that's a lot of white houses, you really don't need more than 50-60 white houses in my opinion.