The ball will only travel at 15°, 30°, or 45° angles. If the ball hits a brick, the brick disappears and the ball ricochets in a different direction at the same angle. The ball's speed depends on the type of brick that it hits: gray and black bricks increase its speed, while white and square, indestructible bricks have no effect. A sound effect is also played when the ball collides with an object or wall, with walls producing the lowest pitch and black bricks the highest.