Write a story for a running app (health - environment based)

I'm developing a running app similar to zombie's running game. In essense, a story is told (intermitted by music) in which the runner is the main character. This story should be about the runner being a secret agent and him being "activated" to accomplish missions. There should be about 20 missions. Each being about 15 minutes long when acted out. I do want there to be a positive message to the story. Missions against the secret goverment trying to brainwash people, collecting healthy items and giving the runner some info in the meanwhile. Interesting characters on the telling side... Optional is also the recording of the story. If you are interested, please contact me for more details. I would appreciate a short introductory chapter/ideas, so that I can see if you are apt for the job. I hope we can have a fruitful collaboration!