I figure I could be of use here. Hold right click to skip through dialogue, and I think the scrolling think might just be your mouse. It works fine for me. Also, as far as I'm aware, there are two endings (there might be more but I went through the games code and I'm pretty sure there's only the couple). The first is the brainwash ending. This is just the basic ending. Just use the radio and answer all the questions. The second one is a lot more surprising so I won't spoil it but just ask Manuel about contacting the Devil. That's all the stuff I can help you with. I'm sure the developers can help with the rest.