Level 11, the jet pack only level is ridiculous. I loved the game, but giving the enemy 2x as many units that grow exponentially before your slow squad of 10 can even make it there, they end up with about 4x your team, even if you try to split your squad and capture as many buildings (about 4) or be conservative (capturing about 2 or 3), even attacking bases that they just weakened, the AI is too fast on that level. Strategy doesn't matter if the AI has 4x as many units as you, and controls half the map while still being able to attack you. And IF you try to defend, say, send units, half or all, to recover a base they took from you, they automatically send units to the low bases, and you now have to little defenses to stop them from raiding your entire base. GG.
*sigh* I tried to be tactical, and only feed on the bottom floor, since zombies can't climb (page 56 of the Zombie Survival guide) But, when I decided I should start eatting the second floor, THEY WERE ALL ZOMBIES. My findings? Super man got bitten. That asshole flew around eating my plans >.>
The only complain I have, is that units such as the succubus will see an enemy, and start charging at it. I find myself mashing the 'retreat' button over and over again. Also the fact that during the goblin madness, I had all 4 Titan units going, and it should've been easy. Except for the fact that ever time one would start moving, he'd turn around and start moving backwards attempting to attack the goblins behind them. Having a button that made it so units will keep moving regardless of whats there, or a button that let them not turn around would really help.
For cave trial five, just make sure u have goblins and the gnome enginers, then mermaids and witches, the other two should just be good long range, I prefer cannons and sucubus. The trash people help stop the overflowing trash mobs, the mermaids push back that damn invis thing, and the witches do the same, the rest are just damage. Use all AoE spells
To beat mother cube I used 4 homers, energy homers and big laser, I spammed the homers when ever possible and then used the big laser when she sat still
To get past the boulder part for the boss CONCRETE THINKING just put the small boulder into the hand above, repeat with the other, then click the shadow, then quickly right click