Whose Hellos Are These, Anyway?

In a quirky town where everyone knows everyone, you, a rookie detective, are tasked with solving the mystery of sudden, unsolicited greetings appearing on people's doorsteps. Each 'hello' leaves behind a peculiar clue, leading you through a web of town eccentricities, past secrets, and an array of offbeat townsfolk. Use your wits to navigate through humorous dialogues and unexpected events, piecing together the oddities that bind the townspeople and uncover the enigmatic greeting card creator. Who's behind this bizarre phenomenon? And more importantly, what do they want?