Thanks for trying it out!
I completly forgot about the local bevy... I will change that soon.
Monochromacity was part of the design, because I am colorblind and don't like to work with colors. I probably should change the color of the enemies to help distinguish friendly and enemy bullets.
Guns should work, but you have to click a second time after placing to choose a direction. I hope that helps?
You gave some feedback about colors and controls, and I really thank you for that!