my god. too much lag.. one minute, im fully upgraded and attacking a big group of bubbles. then, it starts lagging, i slowly watch as my bubble tank dies because its shooting in the wrong area and I cant stop it because its out of lag. :L
My Number 1 tip:: make your tank completely out of guns. It'll be faster (able to dodge bullets) and you'll be smaller, making it harder for ships to target you and hit you.