flat halloween with haunted house, pumpkins, bats, spider webs, and full moon. spooky holiday concept with

halloween greeting card happy lettering haunted house pumpkins bats cartoon holiday text spooky pumpkin castle ghost festivity cemetery bat graveyard flat design invitation stars fantasy seasonal poster event party gothic october creepy night template fall moon silhouette flyer mystery concept celebrate festival layout magic cross drawing palace scene simple tower symbol spider web ai generated