Very nice style and look to the piece. The water and the ship are very well done. Overall, though, the image seems quite static, and I think there are three things that might help.
One, as Lekku just pointed out, is the lack of sails. Even if the sails are still furled (or whatever the seafaring name for furled may be), it’d give you a chance to set them on fire or something similar to add a little more life.
Another thing is I’d like to see is some piece of the mast falling away from the laser beam. I think it would be more interesting to capture the moment right after the laser causes the mast to explode rather than just before, as you have it now.
A third element I’d change is the position of the spaceship legs. Being perfectly vertical doesn’t convey any action or movement. You might want to take those 4 legs and put them in a menacing position or, at the very least, trail the legs behind the body a bit so you don’t have so many completely vertical elements and also give the space ship a feeling that it’s advancing on the sailing ship.
These are mostly composition elements. The look, otherwise, is well executed. I’m sure it’ll make your 3-year old giggle with delight…or scare the bejeezus out of him and make him wet the bed for 8 more years…but either way it’ll make an impact.
Keep up the fine work!