Maybe I'm silly and am missing it, but I don't see it anywhere, who did the main menu/banner art? It's so lovely!
It was a two-ways process: I worked on it myself as for the base concept, the sketching for the idea and the composition and then I worked with a french artist I really appreciate called Jean-Baptiste Dessaux aka jbn0s0rus for the final piece of art 😄
You can check their ArtStation here: https://www.artstation.com/jbn0s0rus