For what it's worth, the only Android games I've ever paid money for are Snakebird, Ending, Super Hexagon, and a chess training app, and if I remember correctly

For what it's worth, the only Android games I've ever paid money for are Snakebird, Ending, Super Hexagon, and a chess training app, and if I remember correctly all four were free no ads with paid additional levels. I am the type of person who deletes apps with too many ads. Look up Ending for a good model to emulate (it was a pleasant experience and it has a level editor) though I remember it having too few levels since I played through them very quickly.