Is this not the same thing in Zuma where after you make a match the gap is closed between like-colored balls?Like-colored marbles will seek out each other.
I do like the concept of 'flinging' balls at each other though. That's an interesting use of the the stylus.
ETA: I just read a review. It seems like a launched ball with be pulled towards like-colored balls during flight, so I guess it is a new twist afterall. And there are multiplayer modes too which could be cool.