Ah, I see. If there was missing text explaining that you die, then that makes more sense! I don't thik the screen went black, or if it did, it was fast enough to give a sense that something like a death + restore had happened.
By "selecting the search options was making Rook walk around too" part refers to pressing W or D to select options shown in latiosruby's screenshot making Rook walk left or right even though the game was in "dialogue mode".