You just have to defend yourself from waves of pushing cubes but the only things you can throw against those cubes are just other cubes. The longer you can survive , highest the score you get. At the end of the match your score is added to the virtual currency that you can spend to buy skills that improve your effectiveness in the game. You can also spend this currency to buy new games in the shop, such as : 16 levels of the minigame Phy, in which you have to make a red and a green cube collide with one another, without they touch the ground.2 levels of the minigame AirCatch, in which you have to destroy cubes before the exit from the screen. 2 levels of the minigame Dodge, in which you have to avoid cubes that fly in your direction. 4 different background for the menu and the game. And also 5 different Game Center's leaderboards.