Shield Defense Instructions
Earn money by killing tanks and buy upgrades between levels to stay ahead of the game. You will receive one bonus point every 3, 4, and 5 levels in Sergeant, Captain, and General mode respectively? don't forget to spend them! Kill the boss tank every 10 levels before time runs out for extra bonus points.
Use the mouse to move your shield. Press 'p' to pause. Press 'r' to use repair kits. Use your mouse button or space to activate your Antimatter Shield or fire projectiles caught in your Sticky Shield.
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