iPhone Qwak is now on a limited time sale, with 66% off, until update 1.1.
Qwak for iPhone, iPod touch, and iPad on the iTunes App Store
Update 1.1 was submitted today (might take up to around a week to make it on to the AppStore), and has the following improvements:
Better, configurable controls.
Option to resume a saved game.
Tweaked the difficulty level down a bit (so regular mortals can now enjoy the game).
Auto-fire option (like having a semi-automatic egg firing gun).