Appears to be some random scripting going on (or not, couldn't say since I'm not an architect).
My solution involves hitting the middle box (with all the roach queens inside) and stopping at the top-right of the screen next to the stalwarts. After that it'll probably be a case of trying slight variations on that until it works...
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Without struggle, there is no progress, so get up, get out, and go make the rest of your life the best of your life; you deserve to live the life that YOU want to live...
Progress - Gavin G