foyleman just completed a 3D adventure/action game for the iPhone. You'd be surprised they kind of stuff you can do on the iPhone and this is a great example.

I'm asking that you checkout the game Dr. Nano that myself and a few others created. There is a free version and full version for only $2.99. Give it a go if you have an iPhone or iPod touch and if you like it, review it on iTunes.

Download from iTunes

Dr. Nano

A fantastic 3D journey into the human body. You are boy adventurer Dr. Nano, wielding future Nanotech, as you shrink down to the size of a blood cell and treat your patients from the inside-out.

Blast Away Plaque
Shake off White Blood Cells
Destroy Nasty Viruses
Fly around in a Foglet Nano Submarine
Fight Parasites in a life and death struggle
Fly through the arteries of the human body and into the heart

21 EXCITING LEVELS!
BATTLE THE MOTHER OF ALL PARASITES
UPGRADED MEDICAL DEVICE DEFENSE SYSTEM
GET A FORCE FIELD
RELEASE A FUTURISTIC STENT
FLY THROUGH THE HEART
SPEED ROUND BONUS
AND MUCH MORE!

Requirements:
Requires iPhone 2.2 Software Update
Tested with Iphone 3.0