For a better flame overlay. Make a 500*500 canvas in photoshop. Black Foreground color and white background color. Go to filter render then difference clouds. Then go to distort and change polar coordinates to the Second one. Go to filter brush strokes accented edges and set it to 5, 38, 6 as followed. Go to filter render light effect. Move the lighting the way you want it and set the first color to orange and the second one to a red color. Looks more like flames. or it can make a good wallpaper.

Nice theme by the way.

Ah man 0 scrolling on both directions. Could be better if you release a version 2.