For the new gun, it needs to be chambered with OPERATE before you can shoot, which in hindsight is something that definitely needs a better explanation. The revolver is still in too, just have to find it. The intro sequence is a rough first draft at the moment (so that there's some introduction), and I do want to expand it later - and there are definitely plans for the dude in the darkness as well.
Thanks for trying out the demo, glad you enjoyed it despite the difficulties!