There is not as much people playing on the android app, and lesser using a ps3 controller on it... Maybe that's why you don't have lot of answers. But insulting the game is a good way to get one, so keep going
You will find in attachment a file that was on the french forum of the game, contains the mapping for sixaxis controller app.
As said in this message, you past it on your phone at storage/emulated/0data/com/dancingpixelstudios.sixaxiscontroller/profiles and then you choose in "active touch profile" the option "zsdx", as shown in the pic...
But because I can't try myself (I don't have a rooted device, yeah I know I suck as well as the game, or wish I could), I can't guarantee you it will work. Hope you will survive anyway, else you can also play on your computer, and you will understand how much you are false about the quality of the game.
