I really like the way you have used used the light vs dark (chiascuro in a way?) in this image. It's a very defined image. I like the composition you have used- it lengthens the image nicely. The strong vertical black lines are very clean. I think you have balanced the contrast between the lines and the shoes well. The shoes make a very good off-centre focal point making the image have keep the length.I think this is simple and good composition.
Your image is "simple" but it has a high impact and your choice of title 'Ninja Shoes' compliments the mood set up in this image - I think it lifts the image from being ordinary and captures a little bit more of the mysterious atmosphere your palette of grey and blacks is trying to create. I really like this image for its simplicity and impact.
My only argument against this image would be that the monochromatic/black- contrasted- on- grey- look lacks a touch of originality which is why I have scored you a bit low on that but I think in this image you have used it well so you get some points for technique.
I imagine it framed with a simple black frame (once printed) I think it could make a very interesting feature on a white wall- hanging all by itself. A very clean and interesting image in my opinion. Good work.