Thank you for trying out the game!
It seems like I can never get the tutorial right, believe it or not, this is the fifth iteration. I'd rather players learn from experience since defeat is not very punishing hence why the tutorial is completely optional. There's also a "how?" button that explains what each attribute does, I think 4 stats is simple enough and respecs are free.
Right now the demo is around 1 hour long. Don't worry about spiders but I can't promise you won't see something disturbing if you ever play the full game.