so basically i'm working on a game at the moment in which you must commute around towns using public transport. you start each, uh, "mission" with a certain amount of money, and have to meet objectives along the way.
also, the maps look very much like the london underground map:
http://mappery.com/maps/London-Underground-Tube-Map-2.gifbut obviously on a much smaller scale. also, while you're sat on the train, you can have RANDOM ENCOUNTERS (like a grandma talking to you, or bumping into a drunk) and certain EVENTS can happen (train is delayed, someone jumping in front of train etc) and sometimes these will be part of your objectives (you have to do certain things in order to ensure the encounter happens, and this would be part of the "mission").
i'm working out some cool missions at the moment, with the ones so far being pretty menial (GO TO WORK, BUY PRESENT FOR FRIEND etc) so if you have any ideas for missions or anything to say at all please feel free. i'm making this in game maker at the moment but this is a pretty cool idea for iphone/ipad so maybe i'll have a go developing it for those platforms sometime in the future. when i get some skills.