wow, interesting way to go about this challenge! i vike the contrast between the brich joyfull pink and the sad blue. Very good job!
i also really like the placement of the moon, the piece overall gives a real sense of tranquility.
some remarks:
-maybe you could try and make the transition from blue to pink in the moon a little softer, right now it kinde feels a little unnatural. If you really want to keep the bold transition i would suggest having it follow the shape/ curvature of the moon if that makes sense?
also the silhouettes of the buildings in the background seem to have dissapeared. I would also try to create a gradient of the red light you put in towards the sky and maybe have a couple of small clouds to break it apart.
Anyway, love it! good luck