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In the physics game Cruel Balls you will be eliminating some blocks that are trying to hide in their improvised castles. Use your balls to shoot them down with a direct hit or tumbling their own castle into them and crushing them. Try to be precise with your shots and minimize the number of cannons that you use to get more stars in the end of a stage. Soon the castles that they are hiding in will become bigger and you can use different kinds of cannonballs to take them down like the heavy balls that can break through thick defences. They are limited though unlike the normal cannonballs.