This was mostly lame, though two points worthy of mention... 1.The elevator that looked like it went up to a teleporter but really only went to a room just below a teleport ceiling was an unexpected twist, and 2. The metal block that shoots out of the door you open like normal at one point and tries to shove you into the wall behind you was brilliant!

The traps, ok. The combat felt very cheap.

The invisible walkways could bounce off grenades, making it fair game, and the mechanics shown to the player beforehand.

How do I avoid getting blown into the lava door? I can't get past there.

I'd like to know that too, Mike. I ended up noclipping through it. Also, I think the invisible walkway trap could've been executed better, like by making it likely that the player kills a scrag on top of one.