The idea for the photo is great… it’s spotted really well. However, shooting in these sort of low light conditions isn’t easy and the shot is a little soft and noisey because of it. I’m not sure if a tripod was used or indeed if it would have helped, but the softness is what’s going to kill this shot if you ever print it.
Top marks for spotting it and the composition. Also top marks for battling against the low light, but unfortunately the technical delivery has let it down a little.