Like the concept, the blue colour and texture of the wall is good too. Not sure the composition works for me but there are people on here who are a lot more experienced than me and may be able to point you in a better direction as to why that might be or give you advice on the more technical aspects of your photo that are beyond my ken.
Of course I really had to resist the temptation of just saying I like it !!
sorry, I couldnt resist. looks a little cool to me. probably on purpose. i would have liked it more seeing the shadow, but not the actual tree branches.