In this game, waves of enemy ships are attempting to steal gold from your mine. To defend against them, you can build towers that will automatically attack the enemies as they get close. To build a tower, first click on the tower in the top left corner of the screen to select it. Then, click on an open square to place the tower. You can build a winding path for the enemies to follow by placing towers strategically. This will maximize the distance that the enemies have to travel (EBL) and give your towers more opportunities to attack them. If you're having trouble, you can try playing in easy mode to perfect your strategies. For advanced play, you can switch between towers by pressing the Q, W, E, or R keys on your keyboard. In later levels, you can also upgrade the range and rate of fire for your towers. To do this, click on the tower you want to upgrade and then click on the ranged or fire-rate symbol to apply the upgrade. When you have a powerful maze set up, you can press the fast forward button to speed through the levels.