I can pass level 3 and 4... Then I get killed at level 6 or 7. Hard mode is agony. I really think it needs to be pumped up to an impossible badge, or just changed to "beat the game on normal mode"
Airstrikes can be prevented by shooting down the plane as it passes by over the horizon. You can't destroy the plane as it's going to bomb your house.
The planes are not broken.
This game is ridiculously awesome. I've got 95 awards so far.
Also, a recommendation: Fix the clutters! Currently, mini-clutters will have no "effects" on them when a big clutter dies. This means that if a big clutter was slowed down or inkied, or even melting, killing the clutter does not result in mini clutters that have the same effects!
Glitch: Wave 16 of the concert
The "Absolute slimes" or whatever somehow had their max hp reduced to 1. This also randomly gave massive experience boosts to some of my mages.
I use for survival a warrior, a cleric, a conjurer, and a mage. I find that maximizing the number of "end of battle" effects I can get on everyone helps.
 "Stick Arena: Ballistick")
 "MoneySeize")
 "Sonny 2")
 "Orbital Decay")
 "Dinowaurs")
 "Epic War 2")
 "Mytheria")
 "Storm the House 3")
 "The Necronomicon")
 "Brute Wars"){kind=icon}
 "Runescape")
 "Amorphous+")
 "Tangerine Panic!"){kind=icon}
 "Protector: Reclaiming the Throne")
 "Typing Ninja Hunter")
 "Hedgehog Launch")
 "ELEPHANT RAVE")
 "Monsters' Den: Book of Dread")
 "Music Catch")