If you're having troubles with trojans: Since they can't push down men, they tend to stack on it. This makes trojans much easier to deal with. You can say they're weak against footsoldiers.
Hint: You don't have to complete the challenge at the glacier that requires you to make a new duck in order to get the badge.
Anyway, I'm not sure how you could let the game get this grindy. It really... Derp.
Hint: On the later levels, just click randomly. It's just about pure luck from there on. By simply pressing the center as fast as I could, I completed level 12 in one go. :P
The controls in this game are messed up, and it bugged out in the tutorial so that I couldn't shoot laser or swap to my secondary weapon at all... I don't see why anyone likes this.
It's incredible how the simple revive-bar bug can simply kill you during the most vital points of the game. >.<
The game is meh, the humor is meh, the bugs are tedious and it hogs resources like crazy.
... The boss was flippin' easy. Just focus on defense + counter and you're all set. With 93% defense and 93% counter, you're simply begging for an attack.