I think there's a degenerate strategy here involving running around a corner and triggering the same two objects over and over. But ignoring that (and my own lack of patience causing quite a few game-overs) its a neat concept that works pretty well!
Yeah we noticed that. We tried to playtest as much as possible on the last day to avoid exploits but, to keep it playable for everyone and not make it too difficult, some sneaky strategies are still possible.
