I beat it. Not too hard. Just get 4 IonCannons and buy some machine gunners then save up for a Super Soldier. THen get 3 WarMachines and a few more Super Soldiers. Super Soldiers do tons of damage to base.
Nice try on your first game. Make the faces in waves though. Like they get more powerful every time. And maske turret have health. Add upgrades so you can upgrade your turret.
Tip for rounds: Max out the resource getting thing then get the recycler to lv 3 or 4. Send out battleships and destroyers AND cruisers and atomic subs and a few bomber jets. That owned.
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