The Juggernaut can deal out massive damage with Uppercut -> Taunt -> Weapon -> Jab -> Weapon. You can basically ignore trying to use jab with openings and managing your power level because the huge bonus damage from taunting is at least as good.
There are so many problems with this, it's ridiculous. I lost a game to a victory screen freeze last night. Today I continue, saving fairly often. After another victory screen freeze, I find out that the game was only PRETENDING to save. Instead of the animals and progress I had (and the animals displayed on the save game popup), I have only my old save from last night. I'm tired of sinking time into a repetitive and near-mindless game just because it won't record my progress.
I love the concept, but the execution is terrible. If the games worked correctly (falldown, notably) and lag wasn't the game-halting beast it grows to be, I'd give this thing a pretty solid rating. As it is, the game works contrary to its concept half the time.
It's not really "deep strategy" when you can't see what's coming to plan ahead. Some maps have an obvious theme, others just pull random crap out to own you.
The only tough part was before I realized that the pistol could take down the mechs pretty easily. Headshots are difficult for a couple levels, but after that I was just throwing them out left and right.
Regarding the below comment...if you've ever played a game of this type before, the ammo bar should have been very noticeable.