With Big Blocks Battle, it's a battle to preserve points rather than make them. The player operates a cannon by clicking anywhere within a yellow circle to place the cannon, and aiming by dragging the curser in the opposite direction of the target and releasing the plunger. Cannon balls cost points so conservatism is the best strategy. All the blue blocks must go, because if one green block falls it's back to the drawing board and the round starts over. By the third level it's got you wondering and by the fifth you're hooked.