Damn, that looks nice! haha
The only thing that could possibly be worked on or removed is the shadow of the "waves" in the flag. The original picture included the waves which is half the reason of the deformity of the flag. Is there any way you can shop in kind of like wrinkle/wave to the pic to make your flag look less sideways-prison-cell-shadowy?
Or Removing the stripes and using burn to darken some areas and create a "wave" effect that kind of accents the deformity of the skull.
I really do like yours though
Sorry for the OCD going on here but the stripes just kind of looked out of place to me
Edit: Thought just hit: Using clone stamp to create the waving effect. Like using it to break up the lines so they are off-alignment and it looks like the patchwork fabric is actually curling and "waving"