I'm not into shoot them up games, neither the older I'm getting arcade style offerings. I have though been super impressed by SimCity Builit - the iPad 'touch' version of this classic game. Building a city, balancing the happiness of the sims with the annual budget. Making sure the taxes are appropriate but not too heavy to drive people away and then specialising in some enterprise, from coal mining to tourism. The graphics on an iPad Pro are amazing, you can rotate a city