It's a really cool piece of graffitti. Your shot is an excellent record of it but I'll offer my two cents' worth ... if you don't mind.
The graffitti was created by a very talented artist and it deserves our attention ... the question we need to ask when photographing it is: what do I want to say about the piece ... or about the artist? Taking the shot from a different angle, including some 'urban' clutter or interestin people etc can make the shot more than just a techniclly good record shot. Hope this helps. Best regards, Rick

Typed too fast and didn't proof read ... apologies. ;-) Rick

thanks again for your helpful comments, rick. will try to take that in to account for next time.