This game sucks. I just got it for the card drops.
People who play this game should be the ones getting money from the dev, not the other way around.

Just don't. I only bought this game since I had a 75% off coupon making the price $0.25. It's not worth the $0.99 price tag. This game is incredibly slow, it will take you forever to get to one place in these tanks, the tutorial mission has a 2 minute time limit and your objective is to reach a town that is about half a mile away, I went straight the whole time and had 1 second to spare. The aiming is atrocious, the aiming reticle does not line up with your tank very well, you have to sit still for a full 5 seconds for it to be accurate and it's nearly impossible to hit your target while moving. And if you mess up and die on the third mission, you go back to the second one, just to add some more confusing game design choices into the mix. This game has a mixed rating, and now I see why.