This is really good. I especially enjoyed how the personality choice influences some dialogue and felt like I could make a character I was happy with while letting the story drive the rest. A lot of customisation options, which is always nice to see. I played through all of the branching sections towards the end, and I was surprised at how different they all were! So far the characters are all intriguing and give off very different vibes and I'm very curious on what's going to happen next.
I also don't see anything wrong with your writing, and although I'm not an English Lit professor, I can safely say that there is a nice mix between descriptive prose and flowing action :)