Also, as an FYI, in a design like this, don't overwork yourself -- only do half the image and copy/paste/flip-horizontally the image so you can have the entire thing. At that point, you just tweak the light-source/shadows a bit to hide the fact that you took a shortcut. This is how most professional artists used to do it.
But as an aside, the water does look nice blurred in the original. If you kept any of that from the original, that would be the *only* aspect I'd suggest keeping.