Blue Defense (100% Pen)!!! ==================================================== Health -- top left Towers Available -- bottom left Click to place a tower, and press space to start the next wave. How to get another tower: survive waves. Every two waves, you unlock a new Tier1 tower. After every six waves, you unlock a new Tier2 tower. And after every twelve waves, you unlock a new Tier3 tower. Press 1, 2, or 3 to switch between which tower you are placing. Press X to undo a tower (you will get it back).
