Depending on what those other features are, you could just make an iPhone-specific website and users can add it to their home screen as if it were an app.  I know Jerkcity does this: http://jerkcity.com/ip/  Has its own custom icon when you add it to your apps menu and everything.  Unless you have something that HAS to be in an app, this will be way simpler for you, especially since you can avoid the whole approval process by Apple and paying developer fees and everything else.

I've only done a bit of basic iPhone programming, I could definitely do the opening a web page bit but beyond that it depends.  Still, unless it conflicts with something you didn't post here you might want to consider the route I mentioned above.

It's not necessarily a cheap thing to do.  It costs $99 (I think per year???) to even be able to test an app on an actual device, then you've got to consider how much you'll be paying the developer for their time.  Plus, if you're not very good at marketing your game, how are you going to be good at marketing your app?

Hahaha I had no I idea you had to pay that! That's terrible.

This changes everything.

Whenever I see really shitty apps that blatantly only took two seconds to make, I wonder why the heck that person paid $99 to put that up.

Android have AppInventor. Pretty sure you could make that point to a webpage with zero code.

If not that then Eclipse SDK.