A new official Hollywood Undead version of Heardle (itself a music version of the viral daily brain teaser Wordle) officially launched yesterday at hurdle.glitch.me.  Listeners are presented with a super-tiny snippet of an HU track and have six guesses to identify the correct song the snippet comes from.  As with all Worlde-likes, a new song/puzzle/whatchamacallit drops daily based on your timezone.