Hey Alisa,
Really nice work here. You got a really awesome sunrise to work with. This all looks really good!
I have just one small nit that I would touch up on if it was mine. In both lower corners you will see a hair of vignetting going on. I would lighten each corner or use content aware fill to even out the light in those corners. Whoops, one more thing. The level could be off very slightly also.