N E B U L A Storyline: Gregory Stone. Graphics: Character/background Gregory Stone Monsters Joan Stone Scenes: Gregory Stone Creator's Note: Feel free to add and modify any of the worlds in Nebula with GameMaker. I certainly would have liked more then four planets and stars in the game. Perhaps a dark planet (in which everything is black until you touch it) would add to the game. You should add your name to the ones on the list above under a short descrip- tion fo your addition, but you may not erase any names currently in the list.ÿ