ill past all of my badges i got: Congratulations! You've just completed the Lost in Space Challenge! You have earned a card from our collectible card game.
the best place to put you sniper is in the middle of the map and put a range modifier next to it,then keep on uprading the snipe while making more towers easy peasy
loool i had an awesme glitch where my shock tower i upgraded for 40 and then insted of saying 80 or somin i said 40 and i kept on upgrading it(ps i think i upgraded it for free coz i didnt lose any money afterwards!