It's anice sunset, and I like it that the dog and ship are in it, but IMVHO the diagonal doesn't really work well. As a photo, I think this one would just simply look better with a level horizon. ~5
A tilted horizon is not wrong per se, but I believe it should be used carefully and for a specific purpose, for example to increase drama, to compliment an unusual perpsective, or to compliment at theme such as abstract shapes. In this case, to me, it brings nothing and indeed detracts from the viewing experience. On a positive note, the reflection of the setting sun on the ater is nice, but not enough to raise this from a 2.
Need to make use of the full 640 pixels. Also it looks like you just took an ordinary photo and turned it round, rather than bringing the diagonal theme into the composition.