Thanks for the comment, the long ones are always helpful!
1. Runes turned out to be a bigger problem than I predicted. The parking level went through several iterations. The first one was way to easy, and could be finished in seconds. The second one had invisible runes, but their placement was NASTY. The third one had rune placement pretty close to what you can see now, and the fourth one is what you can see. The "wall rune" was one of the medium-hard to find originally, but pretty much everyone tells me it's the hardest one now.
2. Yeah, I sort of made a mental note to make it better looking, but forgot about it in the end.
If you liked this one, you can check out my previous games. The previous one was the first with the invisible ghost (although the code was completely rewritten), and the one before that, a pretty standard Left 4 Dead inspired fps.