I'm not sure if it's classified as decent, but at the moment I'm playing City Island
https://play.google.com/store/apps/details?id=com.sparklingsociety.cityisland&hl=en_GBon my tablet.
It's my first encounter with a 'casual game' which is probably what you'd call it. At the same time, I read this article in Edge magazine
http://www.edge-online.com/features/grinding-to-a-halt-are-the-tricks-developers-use-to-hold-our-attention-losing-their-power/City Island is a beautiful example..for some reason addictive though it has incredibly shallow game play. Basically levelling = clicking/tapping. You know they've implanted all sorts of psychological reward triggers in the game but you get dragged in nevertheless, working away to gain meaningless points using no skill whatsoever. It seems pretty standard to have one reward easy to get e.g. money, which draws you in and keeps you engaged and another harder e.g. gold which allows you to get some of the bigger items..it's this 'harder to get reward' which you pay for. You can actually feel the manipulation working in a way you can't in a game like LoL or TF2 when most of the time when you carry out an in-game transaction it's because you just like a skin or want your demoman to have a parrot on his shoulder or something.