Mega-Fill-Up is a project mainly written in OBJECTIVE-C and C, it's free.
Balloon Blowing Game for iOS
mega fill up
"balloon blowing" game for the iPhone. uses cocos2d. lite version shows pretty good how to incorporate iAd/Admob with cocos2d.
http://www.minyxgames.com/mega-fill-up/
LICENSE: code: GPL3 (where not stated differently) artwork: Proprietary