this is childs stratagy, just so people wont hatva goto like the 5th page to find it XD
you have to keep your left hand on the hotkeys 1,2,3,4 so you don’t have to stop killing missles.
First thing: You have to save up 800 then buy your 1st missle upgrade, then save about 800 more and upgrade the flak as much as you can, then upgrade the shield siphon so you can keep the flak gun running the whole time. Next you upgrade the EMP as high as you can so you can just clear the screen. Right after you do the EMP you need to recharge it with the shield siphon then just keep upgrading.