If you type in any buff (strong or armored) at the end of the level without summoning any units with the buff(s), the first unit you summon in the next level you play will have the buff(s) that you typed in the previous level without having to retype it. For example, I am about to destroy the enemy base, so I type in "strong" and "armored" before the level ends. In the next level I play, I summon a dot right when the level starts, and this dot will have the strong and armored buff. This can give you a huge advantage at the beginning of a level and can make the later levels much easier.
I'm not sure if this happened to anyone else, but for me there was a glitch where I didn't get any stat points from in-training items when I leveled up right after training.
@bobi999 you select a troop (person) and get close to the heli-T. move your mouse over the heli-T and it should say enter. click the heli-T when it says enter. if you cant you have to get closer
Whenever there is a good gun in a room, take it, come out, take it again, until you have all four slots with that same gun. The game is really easy from there.
In challenge 4, whoever thinks that the dragon only aims for the sword even though the shield is in between, make sure the shield isn't up against the dragon. The dragon shoots at the closest bot IN IT'S RANGE. The sword and the dragon are both using long range weapons, so they can't attack up close. It's very hard to do but you have to put the sword and the shield in the range of the dragon with the shield closer, but the shield can't be too close or else the dragon won't be able to shoot at it. Also make sure the shield isn't blocking the sword's attacks. It took me forever to beat that challenge but I'm proud cause I still beat it! :D btw 5/5 but would be even better if it had a better bot control scheme