I have for you a very unique theme. This is a vertical theme for horizontal monitors! I have a virtual pinball cabinet I am working on and because of how the VPin software works it was just easier to set up my machine so that my monitor was in landscape (horizontal) mode, but physically rotated to a vertical position. Unfortunately this mean Big Box was pointing the wrong direction. Rather that use some third party tool to rotate my monitor in Windows settings back and forth I just decided to make a faux vertical theme. I wasn't sure how many people had similar cabinet set ups but though I'd share in case there was anyone out there that needed it or wanted to look at the XAML for inspiration for your wacky theme ideas.
NOTE: This theme assumes you have acquired background images and videos ALREADY in the right orientation and does NOT try to rotate and horizontal images to make them appear in the right direction. Clear Logo images work as is and are rotated appropriately.