The New York Public Library is inviting 500 people to compete in a smartphone-based challenge for a library game night. “Find the Future: The Game,” devised by renowned game designer Jane McGonigal, is a series of “quests” delivered via an app on players’ mobile devices that can be completed at the Library’s 42nd Street location. A group of 500 players will be invited to play the game for the first time at 8 p.m. on May 20 to tackle a list of 100 overnight challenges. The challenges are designed to encourage players to explore and reflect upon the objects from the library’s collections. A player might be tasked, for instance, to scan a QR code located at the Declaration of Independence, and then respond to a creative essay prompt. Once enough quests have been completed, they will be “unlocked” for the public, who can begin playing the game online May 21. The promo video makes it seem pretty cool, and it is very cool for a library.