For me, this signifies how much the mobile gaming interface sucks. Touch sucks when it comes to games. Only simple things like flicking a bird and solving puzzles[1] are enjoyable without a physical controller - for most people.

Also, this is basically a download and delete app. Are there any stats on that?

[1] candy crush, sudoku, dots, words with friends, even angry birds is a strategy more so than a skill and could be called a puzzle