I work with AI all day every day. Most of the text seems very strongly AI, most of the UI looks AI - it has the standard problems that LLMs like Claude have whenever they try to design game UI or game copy (too complex, doesn't make sense to a human, words that are mismatched grammar, meanigns that are jumbled up, etc). If you say you wrote it, OK fine - but it currently looks very strongly like you did not. I would suggest rewriting your copy to be more natural. It's difficult to read, in exactly the way that long AI-written text is difficult to read.
Similarly ... The tutorial is not something I can believe was written by a human, it's so incredibly complex and over-fixated on details that only an AI would focus on.