huh, I'll have to try the game out on a few more machines, the golems/guards are the only other entities in the game so they may not have been showing up or something.
As for darkness, I have noticed that the game seems darker on some systems/monitors, but I tried to make sure that anything that was important was illuminated or had emissive textures. The only actionable changes I think I'll be making are to the initial level design and maybe the terminology specify that the bird creatures are the the things you're supposed to kill.