How do you get to the hidden extra options? I would love to try it again with the shoulder cam and see how different it would feel.
Hey! Go to the Options, then go to Extras. While you're there, press L1+R1 (on PC it should be Q+E) and you'll be taken to Hidden Extras. Most stuff is locked but you can unlock all of it if you get a good enough score at the end of the demo. :)
Oh and to make the shoulder view work, you need to hold the "look" button. (I think that's L2 on gamepad, on PC it's Alt)