Hello!
I've updated the game to fix some minor issues:
Superior scorpion projectile was glitched since the last update, fixed the distortion effect on it.
Changed the end of the campaign a bit to avoid confusion.
The options for shadow quality appeared to be broken, changed shadow quality settings from none/hard/soft to samples of 16, 32 or 64.
Also, this patch lowers the fire ant base health from 80 to 70 and lowers the base damage of the double turret slightly. Lighting has also been adjusted slightly in the patch.