iPhone App/Game

I'm looking for a savvy coder with iPhone App experience (or confidence to start now) to help me build a very simple application for the iPhone. The basic premise is, we're making a nature-themed game for people to play when they're bored. We'll have a tree, which it is the user's duty to water. The tree will grow differently based upon how it is watered (left side will grow if it is watered, etc); and there will be some variables. For example, the user will be able to choose a color for the water, and the tree's leaves will turn that color when it is watered (and only in that spot). That's basically it. There are a couple of other elements I'd like to incorporate, but nothing significantly different than the functionality I've described here: A tree whose leaves change size and color as you interact with it. I am a graphic designer and can provide the imagery. I just need a coder to make it interactive! I'd also like to make this app for Facebook as well, but that will not be covered under this bid. If we like the iPhone app we make, we can re-negotiate to make one for Facebook too. Remember: If you steal it, you bought it!