What could go wrong during a sentimental gathering of family and friends at a cozy old inn in Maine? The answer is: plenty, when the family is, as one character remarks, good at putting the “fun in dysfunction.” Author/director Michael J. Tobin has given his play “Falling Leaves” the subtitle “A Romantic Dramedy.” Currently having its premiere run at the Footlights in Falmouth, this work indeed piles plenty of romance, drama and comedy into its warmly entertaining 90 minutes. Folksy, good humor is the order of the day in the first act as the audience is introduced to Autumn, an innkeeper/matriarch who, a decade later, still mourns her husband’s death.