Try our new software (http://www.casualkit.com/) with a simple SDK or API integration that enables your players to compete against each other for real-money (small amounts to keep it casual) in challenges or tournaments. It will increase your monetization, player engagement and retention.
The integration will not interrupt your gameflow or design, and your players are given the opportunity to choose if they want to compete against other players for real-money.
All games that include a “challenge mode” between players like quiz, sports, arcades and endless runner games are great for our devkit.
Please let me know what you think!