Brothers - A Tale of Two Sons now £1.09 - hard not to take a punt at that price
EDIT - Notice: Brothers - A Tale of Two Sons requires a controller to play
I may have just wasted a quid, ahem.
It's worth buying a pad for. One of my top 5 games I played the last year. Also just get a pad anyway. Worth using for a good few games (driving, third person etc).