Develop an iPhone application like bloons tower defense 4

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
Currently there is a very popular app called btd4 on ipad/iphone. It is a tower defense game.
I wish someone can create a similar app with the following:
a) upgradeable towers
b) easily customized maps
c) easily customized enemies speed and hp
d) the whole documentations

Basically the graphics ARE NOT important. I just want the logics behinds.
And wish you could make a very intuitive documentations on how to customize the game.

The budget would be $100-$200

Skills required:
Cocoa, iPhone, Mac OS, Mobile Phone, Objective C
About the employer:
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