I just finished, and it actually didn't take very much time, maybe thirty minutes? However, that was probably due to the fact that Twyla's QTE was GRUELING to deal with. I had to spam the buttons with a little trial and error because I just couldn't hit each button perfectly in order. Thankfully got it on my fourth or so attempt, otherwise I'd have sadly given up.
That ending, though... SHOCKING. Definitely loving it so far, just wasn't a fan of Twyla's QTE at all. Very excited to see the game continue, take your time making it!