Ben Kuchera of Polygon puts into words what I’ve been trying to say all along.

From Draw Something to Angry Birds, Fruit Ninja to Cut the Rope, the biggest names in mobile gaming got that way because they used the touchscreen in novel ways. The lack of physical buttons isn’t a hindrance to game design, it’s a feature that smart developers have been using to their benefit for years. The developer of Ridiculous Fishing, a game which won an Apple Design award for 2013, didn’t worry about not being able to use buttons; they created a game that used the hardware in fun ways.