Ahhh, yes. I took this same shot a few months ago....Nice and sharp, and nice colors. I think there are other places in the park where you can take this same shot without the bushes blocking the bottom 1/3 of the castle, and where you won't have to be shooting upwards so much. The lampposts leaning backwards is the clue that you're aiming upwards.
Nice colors and sky. Two things I'd like to suggest to improve this image: (1) make it larger (you can use up to 640 pixels wide) and (2) crop the left post off (maybe even all the tree foliage too).
You should've take advantage of the full size allowed which is 640 pixels on the longest side. This picture has a lot of potential, as it is such recognizable icon. Looks like the focus is good. Maybe, a different perspective would've been better, to show the castle in all its glory.