This Ending is not enough

There was this book called the Villianess Reset, it's about a princess who was born with the power of glass. She was killed at the age of 22 and reicarnated at the age of 14 and journeyed to fulfill her mother's wish to avoid death this time. I wanted the story to be different from all the Reincarnation stories I read. It wasn't a surprise that I only wrote 21 chapters and abandoned the book. So tell me why a talking sprite who claimed to be god told me to finish the book or I wasn't going back home. He claimed that he found my book interesting and demand I complete it as the main character. "So if I do agree to your nonsense, I go home right ?" "That's if I like the ending, if the ending is not enough I will kill you." My eyes widened in that, I didn't want to challenge the god so I nodded. "I will give you an ending that is enough."