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I just released a game called Trump Vs Aliens. We build all our games on libGdx platform. It rocks and has made life as a game developer so much easier. Although I should mention we have built a lot of our own classes on top of libGdx.
Link to the game: https://play.google.com/store/apps/details?id=com.allinsw.games.trumpVsAliens.android
Link to the youtube trailer: https://www.youtube.com/watch?v=oI-ja-AwWwI
By far our most popular game has been Election Knockout which has over 60,000 downloads:
https://play.google.com/store/apps/details?id=com.allinsw.games.electionknockout
The youtube trailer for this game has over 10,000 views: https://www.youtube.com/watch?v=Q5cwywg0xc8
The games are simple but I've found more success not necessarily pushing the boundary of technology but making games that are relevant in current events or culture. The games use the 2D stage classes and animation class from libgdx as well as collision detection through their math libraries.