While it was fun at first, the last badge is not HARD to get, rather it is just TIME CONSUMING. I did it for almost 30 minutes just to get to 2,973,947 feet and hit an alien that killed me...Every try after that I kept getting killed along the way and after a few hours just gave up. Sorry, but final badges are just supposed to be a challenge, not a time vampire. Lowered my rating because of this.
 "Toss the Turtle"){kind=icon}
 "Vector Conflict Mobile"){kind=icon}
 "Age of War Mobile"){kind=icon}