did you or will you be fixing the fact that players can climb out of the first trap before the ghost kills them? I had to /slay a few hoovies last night who were goofing off up there when Hale technically won the minigame (there's no trigger_teleport to send anyone who hasn't yet reached the sewer to the minigame either)
better yet, add a trigger_add_tf_player_condition to the minigame area set to give everyone condition 51, which gives invulnerability that doesn't drop when healed by a medic (they can only die when hitting the trigger_hurt at the bottom) with the duration of -1 (or however long the minigame can last)