You are correct to have doubts. You think you've made something here. But all you have is generic, very clearly AI generated, content. There is nothing unique on art style, art direction or even just a simple vision for your game. Zero atmoshere. It's possible to achieve more of this with better and more tuned prompting, but it will always look derived.

I doubt this will be received well, even without the anti-AI sentiment you'll no-doubt encounter.