its easy to win by surrounding the thing your protecting by making a pentagon around it out of solar stations and spamming laser turrets around it, 3 - 5 turrets per solar station, if you need more firepower make more solar stations and repeat. Also include 2 - 4 energy deposits.
It started nearly impossible.. but it got easy when I realised what the sequence did.. you basically only need speed reproduction and just to go to the special cells. and then spam everything when you start to win..
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