The enemies are invading to your Castle! Attend to the Castle Defense unblocked to destroy the waves of these foes. Cool Math Games Castle Defense will rejoice you with cool, fun and exciting play that can get you on the edge of your chair. In this great defensive game, you need to purchase the cannons and place them around the long tracks to shoot down all the incoming enemies. Remember that you only have a limited budget for the first round, so try to place your weapons wisely and kill as many enemies as you can to receive more cash. Ok, it’s time to defend your castle at ABC Kids Games now!