Whose Hello is it Anyway?

Step into a world where you've just discovered a peculiar, ancient artifact that enables you to communicate with historical figures—under one hilarious condition: you can only say 'hello' to them! Travel through various timelines, meeting quirky characters like Shakespeare, Cleopatra, and Nikola Tesla as they help (or hinder) your journey to uncover a secret that could alter history itself. Your task? Navigate wacky scenarios, solve absurd riddles, and unravel a cosmic conspiracy, all while mastering the art of 'hello' in style. But beware; some might not take kindly to your greeting!