"Use your mouse to aim and fire, shoot the enemies before they get too close to your bunker, if you loose all of your health, you will die. 10 health is restored after each level. To buy new weapons, you need enough money, your money is displayed at the bottom of the window. You can turn the music by pressing the sound icon at the top right corner, press it again to turn all sound off. Next to it is Quality icon, press it to change quality, the higher quality, the better graphic, but also lower performance. You can also change it in the options, found in the main menu."
