Best to treat this as a interactive visual novel when you take into the graphic and Bandai Namco track records with it comes to anime games.
In fact, if you look closer, there are actually subtle difference in the game's art and sprit when compared to the anime's. So it would seem Bandai didn't actually employ the anime's crew back to work on the game.
However, what will be interesting to see are the multiple branching paths that may include Witch versions of Madoka, Mami, Homura and Kyouko.
But all in all, this looks just like another attempt at a cash-in. But I belive much of us here would rather opt for the alternate free unauthorised Digital copy rather than footing out Bandai's requested price on the game.
So here's the finger at ya, Bandai.