an option to adjust the distance in which it is performed the air chance. in long rows air chance slow the time to kill a wave, because it throw its to 27-30m to 20m max distance of shoot. i mean: trigger the effect "air chance" if enemies are betwen 0-10m and a bar to move it
from 0-1 to 0-20 (0-20 default)
sorry if i write something wrong, English is not my native language