Thanks for the feedback! The pylons do change color based on health, and they are what's making the powering down sound. I did use 3d sound for the spiders so if you had that you would be able to tell which side they've spawned on. After reading people's comments I do think I'll add a health bar to the player and to the spiders when I get the chance, the player initially didn't have one because I ran out of time, but I hadn't even considered the spiders before, lol. Also, unless something's not working you don't have to be exactly at the port to screw in the light, just at the furnace.