It's not so much the dynamic lighting, probably what's killing performance is the SSAO (Corner shading) and SSR (the reflections). The web version will have those stripped out since they run like garbage in WebGL no matter how fast your computer is. Web version should be up in ~15 min. Again appreciate the feedback, hopefully you'll be able to play the web version without issue.
Speaking of lighting, that reminds me to also mention that the actual puzzle-solving elements (cylinder, cube, etc.) being pitch black made them difficult to find. You'd either have to add some ambient light to the room, change the colour of them, or increase the range of the lighting on the wires so that you can see them against the mostly-dark rooms. : )
Yeah, I was leaning towards doing something about that too. I may add some sort of light to the conductive blocks themselves. I just didn't have a lot of flexibility since the entire game was modeled in unity (using probuilder). I'll look at that if I end up expanding on the idea with additional levels etc.