-Point with your MOUSE to aim the towers. Once a wave starts, the towers will automatically start firing. -Press SPACE to place a marker for your towers to shoot at. -You can UPGRADE your towers by clicking on them, and then clicking the box. (You can click outside the box to close it after it opens) -You can also SELL a tower from the upgrade menu. -Each wave gets progressively harder, along with different color bloops that will start spawning after a certain number of rounds.
