To play the game, your goal is to extinguish all of the fires before the damage bar fills up. To do this, click on a window to shoot water at it. This will also affect the fire level of the surrounding windows. You can use power-ups by clicking on them or pressing the numbers 1, 2, or 3 on your keyboard. The power-ups will help you to extinguish the fires more efficiently. Remember to use them wisely to maximize their effectiveness.