you need to upgrade one of your heros to level 3 to unlock the first green hero and you need to get another hero to level 3 to unlock the second green hero.
i think that an idea might be that might improve the game itself so that it is more realistic 1. add bowmen into the game. 2.make the game show the bolts and magic transfering for the weapon to the monster like being able to see a bolt flying across from a crossbow and slicing into a rat or something like that. 3.make more quests AND A STORYLINE FOR THE QUESTS!!!!!
i think it could be better by being able to hire a hero every FEW ROUNDS! right now you can just start and end missions to get the hero you want. fix this or reply to me profile PLEASE!
good game but i found a bug were in stage 5 i beat the game and then the screen never popped up. my monkey just kept on flying. if that could be fixed 5/5
 "Epic War 2"){kind=icon}
 "Doodle Devil"){kind=icon}
 "Doodle God"){kind=icon}
 "Apokalyx"){kind=icon}
 "Bunny Flags"){kind=icon}
 "Bubble Tanks Arenas"){kind=icon}
 "Epic War 4"){kind=icon}
 "Robot Wants Puppy"){kind=icon}
 "DuckLife2: World Champion"){kind=icon}
 "Protector IV"){kind=icon}
 "Endless War: Defense"){kind=icon}
 "Kongregolf"){kind=icon}
 "Can Your Pet?"){kind=icon}
 "Bloons Super Monkey"){kind=icon}
 "Coptra"){kind=icon}
 "Cursed Treasure: Don't Touch My Gems!"){kind=icon}
 "Viricide"){kind=icon}
 "Penguins Attack TD 2"){kind=icon}
 "Cover Orange Players Pack"){kind=icon}