I've tried every approach that I can think of on this level but no matter what I do, as soon as I collect the red key I get "Oops, not enough targets." And yes, I have logged out and back in and problem continues.
Level6143 still can't get past it. Has order targets message after the OOPS. Have reinstalled app, restarted phone, logged out and in again. Have wasted MANY lives and boosters on this level. This is the second time I've emailed!!! No help was given! Fix this!!!!