Hey hate, I am curious if you mean the cutscenes at the beginning of movies and the special kill animations or the actual levels themselves. But if you are talking about the scenes you should be able to skip them if you use the double arrow in the bottom right corner or the screen. Hope this helps and hope you can find it. :) Happy slaying!
Can vary some by browser/OS. Try to do a search for the file name (can search for files modified in the last day, smaller than 100 KB). Change settings to view hidden items if needed. ...if still having trouble tell me your OS/browser and I can probably figure it out.
You can change key bindings on the settings page and also set options for mouse steering.