I want more!
We made the game so that people learn fast. To continue to develop the algebra skills of your child you can use our resources on how to transfer the knowledge from the game to pen-and-pencil equations:
http://wewanttoknow.com/2012/08/01/how-to-use-dragonbox-and-teach-your-child-to-solve-equations-on-paper-in-a-few-hours/
As for recommending other games (apart from our future exiting products :)), maybe have a look at http://puzzleschool.com/puzzles or http://www.commonsensemedia.org/