First Impression - the most important one: I think this shot has a solid impact on the viewer. The picture is lucky not to have been disqualified as mentioned by one of the commentors there is no much extra from the grafiti.
Composition: What you have here works, but that is all.
Subject: Meets the challenge, but I think you need some more challenges to stratch your thinking and grow you natural talent.
Technical (Colour and light): I love that this is natural light, and the sharpness of the picture.
To grow its vote?: Needs more .. but this is your first entry ... and you did this and met the challenge ...
Summary: Go with your imagination and make it work .. you are going to be so good on this site ...
If you've got any questions about this critique, please feel free to contact me via the PM system.