The runes didn't appear to react to being crossed, which suggests that their effect is quite subtle. I'd also note that there's some... thematic weakness to the notion that the protections created by a rogue require only the direct application of force to solve.

I note that the text has recently referenced the shell game idea again; my pet theory is that each and every door leads to the gate, but only if you detect and avoid the rune trap. Sort of the opposite of none of them being the door- they are all the door, and the existence of the choosing game is the sleight of hand.

Can't wait to see what happens next!