Well done on the tutorial. It doesn't include warp pads though.
I still don't like the elevators though. For one, it takes too long to call one and when you do, you have to run onto it and it automatically goes. Further to that, I once was on one when the Armored Guy showed up and I had no choice but to wait for death. Realistic elevator sure but limiting. I would prefer a call button you could just press Down for.
Why no music?
When I said guards can see through walls, I meant their vision must not be purely horizontal so they can see me behind ramps.