(sorry for double post) They should make the backround change as both players evolve, dont you think? it would be cool to see a futuristic background as a futuristic evolution, other than a forest...
simple to win without using ANY troops, build the best turrets each evolve than when you get to the final evolve buy all turret slots and fill them with ion rays, when the iron rays shoot at 1 person all at once, when the person dies some bullets will be stray and hit the opponents base, causing alot of damage too
a tip to players: to get this badge be wise with your time, for example; dont try to defeat the "bosses" so quick, make them stay at a neutral speed for as long as you can