Described as an homage to Populous:

Reprisal lets you take control of a tribe, guiding them, building land and making them grow in number. Using special totem powers you can control nature itself unleashing its full fury on anyone that stands in your way. But be warned, other tribes may not take too kindly to your intentions and will put up a fight!

Go play it and let me know how it is in the comments below. I've got too much work to do and can't afford to get distracted right now.