You know you could build new robots? :D With the current balancing its most likely just spam mass of robots and try to group them of them near each other that all can attack. Also get reasearch mining stuff and build new robots with mining equip and exchange them with the robots you send on the scrap fields to increase the yield. W A S D to look around.
Build couple of copper and iron factories and then try to surrive and get some more researches ready. Cause of a bug with resetting it's currently a Rougelite :D whats fine cause the next run you have still the researches enabled and can directly build the better robots.