Kay...
First off, IT'S WAY TOO FREAKING HARD! If you want a good game you actually have to make them semi-visible. I randomly click for 10 minutes on each hard one I come across and only find that I click on nothing that looks like a tank and I pass to the next level. Good game still, the voice effect sounds good. I saved the game on 1337 time elapsed so now it's stuck there. :3