all of you complaining about the ad, it gives tips and if you accidently click it the game pauses. Besides, you shouldn't need to have your mouse anywhere near the ad to play the game, and if it messes you up so much, switch to arrow keys, its not hard.
i like how that when you shoot the body of a baloon penguin, or the head of an armoured penguin, it does more damage, then other body parts, realistic :D