Hi, consequences of being an alpha I guess. I'll try to answer a few of your questions.
1.) Allow window mode, the game looks horrible when stretched to full screen. Also a huge amount of people prefer playing in windowed.
F4 will drop it into windowed mode.
2.) Don't start with sound at full blast. It's a porn game, no idea why you would do that. Very least ask people their volume choice at the start.
Default setting shouldn't be too loud, and are adjustable.
3.) Most important! Skipping dialogue or making it faster is the same button as accepting a choice. So when ever I try to speed up the dialogue it chooses the first option instantly; before I even knew what it was.
You can proceed through dialogue using your mouse.