I became a Goddess and created my own world

I was just a game programmer named Shingo Miller working and died like any isekai story then reincarnated by a being with 3 pairs of wings which I call a seraph. I never even thought of becoming a girl nor becoming a "goddess" of my own world. I had a boring, sad and sometimes fun life before, so I will change that and live happily in this new world of mine but problems always seem to find its way to me...why do I have a level system even though I am a goddess? why do I even need these experience points? why did a seraph reincarnate me and not god? I only wish a happy and peaceful life in this new life of mine. -------------------------------- I sometimes post special chapters which aren't connected to the story but fun short stories in the auxiliary volume. I am still a beginner so I am open to criticism as it will help me improve. I'll upload the new chapters once I have time. Enjoy reading my story~