ShiftOS 0.0.4 Alpha 1 is available for download here: https://diamondlifeyt.freeforums.net/thread/10/shiftos-4-alpha-1

ShiftOS 0.0.4 Alpha 1 is adding the "Shifter" which is a program you can use to customize ShiftOS. You can only customize the close button's color in this version, and it is very buggy anyways. I would recommend waiting until Alpha 2 or 3 until you test it out if you want to customize almost everything in the OS.