Thanks for the detailed feedback. The Plasma Torch (light saber) is one of my favorite weapons too. I got rid of the black bars and made the view fullscreen. I'd originally intended to use that space for UI elements, but I think it does look better opened up. I'm curious to know if that fixed the problems you were having with ALT-TAB. Were you running in Fullscreen or Windowed?
I also toned down the spawn rate when the Mechanauts swarm for the first couple of swarms.
I added a new weapon, the Mine Layer also. I should go back and add descriptions for the weapons and equipment now. I've been procrastinating that because implementing new weapons is so much more fun.