Some pieces move, some pieces fall, a piece or two might end up tumbling some more. At least that's how things usually go during your average game of Reaction. You swing your paddle left and right in order to push the pieces towards the evacuation shafts, gaining some of that precious little time before the play area inevitably spills and it's game over.
"Aha", I hear you say, "so it’s a physics puzzler of sorts!" And that is correct. You can play it alone or with a friend in multiplayer, you can go at it in short bursts or try to crack those elusive high score spots.