Also, design issue... when you beat the last level, it resets the campaign as if you are a noob (telling you to go to the first world and not Earth; promoting you to Major after beating another planet, even though you are CEO)
To beat last lvl: build 1 blaster in row with enemy (do not lvl him up). Build a grenader in front of him (lvl him up to max). Rinse and repeat for all rows as soon as an enemy shows up in them. Once that happens, just start building grenaders in front of grenaders (all max lvl). If you get bored/want to speed it up, start replacing your back grenaders with blasters (with max lvl) to do extra damage. Just be sure to have at least 2 grenaders (max lvl) in the front of each row.
Only problem I have is when I accidentally right click... my machine gets stuck going in one position, so I can only move in two directions, which isn't optimal play when there are lasers that you can't dodge in those two directions)
The last hidden level either messed up or I missed something. I blew up the boss and got 3 stars during the level, but I failed somehow and only got 3 stars at the end (no stars for blowing up the boss, or all of the enemies).
I'm only allowed to have 6 creatures total... before having to pay real world money. That has turned me off of this game. I like to collect and even if you have to make us pay, that number should be greatly increased.
Apparently, unlimited hordes of mummies = 8 waves. Well, at least that's what happened to me. Once I got to the 8th wave, no more mummies appeared and I was stuck. This was the first level, after beating the game.
If a battle glitches when you defeat your enemy by poisoning (he continues to get poisoned, and you continue to use abilities but nothing happens), use a healing ability and so far it seems to end the match.
Game started glitching after I trained strength. It opened multiple windows in the game: a Joining cup will remove in training items, Kemenyan flower found (which is constantly flickering, a third window which I can't see but appears to be similar to one of the tutorial windows you get when you start the game. Also, my money became 99999999, and it became week 30 month 12 year 99
 "Nano Kingdoms 2 - Joker's Revenge"){kind=icon}
 "Relic Of War"){kind=icon}
 "Planet Juicer"){kind=icon}
 "GARE"){kind=icon}
 "Kamikaze Pigs"){kind=icon}
 "Billy the Pilot"){kind=icon}
 "Terra Monsters"){kind=icon}
 "Paladog"){kind=icon}
 "Machines Planet"){kind=icon}
 "Chuck the Sheep"){kind=icon}
 "This is the Only Level 3"){kind=icon}
 "Civilizations Wars Ice Legend"){kind=icon}
 "Monster Corp"){kind=icon}
 "The Heist"){kind=icon}
 "Monster Arena"){kind=icon}