interesting but repetitive :P
its cool till about lvl 5... heres my strat go about 2-3 lvls without doing anything but aiming then at about lvl 3 buy a crap load of flak tanks this will totaly kill anything at the lvls 4-7 with SOME help from your 2 main guns you control then just keep maxing out tanks and damage and other upgrades till you can just set and watch the tanks kill crap by them selves with the occasional repar of the first tank :P