Keep in mind that audio compression makes them sound a little worse than they actually do in-game. You can also see some of the new textures in this video (along with some lovely z-fighting on the left wall).
Once again, keep in mind that everything you see is pre-pre-pre-alpha.
I'm also going to tweak some of the weapon behavior today. I realized that most of the weapons (even the shotgun) are essentially rapid fire. There isn't much variety in feel between them. So I'm probably going to slow down the shotgun and buzzsaw and up their damage.