Waves of enemy ships are trying to steal gold from your mine. First, click the tower in the top left corner to select it. Then click on an open square to place it. Your towers will fire automatically once the enemies get close. Try to build a winding path and maximize the distance that the enemies have to travel (EBL) while they walk past all of your towers. If you are feeling stuck, try easy mode and perfect your strategies!

ADVANCED TIPS:

You can switch between towers by pressing Q, W, E, or R.

In later levels you can upgrade your towers range and rate of fire. To do this, just click the tower you want to upgrade and click the ranged or fire-rate symbol to upgrade.

Press fast forward to zoom through the levels once you have a powerful maze set up.