The orange looks cut and paste for two reasons:
1. It is larger than its own reflection on the water. Scale down and center the orange to the same size (or a tad larger) than the reflection.
2. It is too bright for a sunset like that. Play with the contrast and tone it down a bit. Maybe up the red hue a bit.
Looks great anyhow! The more labels you make, the better you'll get!
