To fire aim with the crosshairs, hit space, then press z to reload it again. press the right arrow key to change crosshairs and the left arrow key to change weapons. ENJOY! (If you get more then 315 you glitched it somehow.)
I got the Idea from my mind. I got the weapon and bullet shell and target images from google.CoM. I got the sounds from soundbible.com. The crosshair with the red center is like a target finder because the center is the same colour of the center of the target.