I really like the way you coloured the sky. It reminds me of a sumer night, when the heat makes this flimsy clouds...
The light post on the back is very blue, I don't know if that was intentional or not, but it atracts some attention to itself as it's quite different from the others.
Also, I love the shine the blue rose has. It attracts your eyes right at them because of the contrast with the red <3