Why is your product better than GitHub? Are your tools something that engineers can use from the command line while my artist friends can use the web?
I'd like to just re-state that again, as I also can't find out. Maybe a kickstarter for game development?
The signup area wants you to partition yourself into one of two categories: Game Player or Creator, and their video says that they let the player community decide upon the gameplay mechanics used in their game, so perhaps it offers a voting system for selecting the game mechanics for a new game?