Are there any high level explanations on how to go about designing a game for the iPhone?
How about open source examples for something like pacman, etc?
There are many similar questions on Stack Overflow, with answers that point to some useful iPhone game development resources:
cocos2d is a good high level framework if you aren't looking to use OpenGL ES directly. The functionality works a lot like flash and there is a good dev community with a lot of open source examples. Checkout http://www.cocos2d-iphone.org for more info
Have you looked through the ADC? http://developer.apple.com You'll need to sign up (free) to see the content.