A little wacky, I know, but I have one question: the space above the mural crown looks a little empty to me. Are there any other national symbols that I could use as a crest (so something that would be rising out from behind it like how the red lion sejant affronty sits on top of the crown in OTLs British coat of arms)?
Personally, I would have the bottom part of the mural crown be just above the rightmost part of the shield