If you want to beat the final boss the best thing you can do is turn your screen downwards to beable to see the pigs better then look for a group of 5 or more pigs flying together in the same direction. Once those pigs approach the Baconator you should click in between the leading planes so that they don't get set off once they turn around to go the other direction. The easiest way for it to take massive damage is for the ships to crash into it. I had all the upgrades except the money ones and the last one for Truck and it still took for a LONG time. But still a 5/5 game.
Fun game but I'm extremely annoyed because whenever I make money from selling ore I always have to use that money to charge up my battery. I rarely get enough money to spend it on anything other then batteries or health