To play the game, defend your treasure from the robot army by building towers of Fire, Ice, and Physical elements. Select a tower from the menu on the right by clicking on it, then click on an open space of the same color to place it. Your towers will automatically attack the robots as they approach. Each time you destroy a robot, you'll earn gold which can be used to add more towers or upgrade your existing ones. Look for the High Grounds marked by a flag, where you can build any type of tower and it will have increased range. You can also build towers on Mana clouds in each level to gain Mana. Additionally, you'll earn Mana over time which can be used on three powerful spells: Green Axe to chop down trees, Blue to increase your towers' fire rate, and Red to summon a meteor on top of the robots. After completing a level, you'll earn XP and skill points, which can be used to unlock permanent advantages that carry over between levels. Use your strategic planning and tower defense skills to protect your treasure and defeat the robot army.