hesitating on acceleration, now won't start

2000 Ford Mustang GT convertible:

This past Monday, the car was hesitating on acceleration, now the next day the car didn't turn on (it does crank).  The battery is new, and has about a 1/4 gas tank.  No visible code on dashboard.  There is a lot of dirt on top of the engine (in case it matters) since I park it next to a dry dirt lot.

Don't know if it has anything to do with the problem,you but I hardly move the car since it's my spare car.  I'll take it around the block once a week, sometimes once every two to three weeks.