Hi Alice
Yes, of course you can. Feel free to do whatever you want with it
This theme came from a mad messing about session in Photoshop. I did actually have three themes based on this 'stage look', but for some crazy reason I remember I misplaced some of my files, including this 'Hades Theme and have never found them again.
However, I do still have one of the working-in-progress Photoshop files here which has some of the elements that this theme was based on, which might help you if you want? Screenshot attached...
Let me know if you want this PSD and I'll arrange uploading it.