Ahh, I should assume every level is beatable and isn't bugged (no pun intended). I should have given that one a longer go and a harder look.
Thank you, that hint got me on the right track.
For those who have the same problem and the same room and want a spoiler, not a solution:
Click here to view the secret text
×Allow both queens to go to their force-arrow destinations. Kill the Roaches around the room just so you can be done with them. Approach each queen from an angle that will not scare the queen further into the force arrow cubbyhole. Then, making sure they are within 5-spaces of you, press 5 to wait until they spawn some underlings. Kill them while they are unable to move and then remove the new roachlings. This is trivial on the lefthand side of the room. On the righthand side of the room, approach from the leftmost point (killing on of two roaches in the cubbyhole) and then let the other one approach you and meet its doom.
Thanks again, guys.