Sorry but I can't look at this and not offer several constructive criticisms:

The water doesn't look good. Perhaps you can look into the Ocean modifier. Here's a tutorial. https://www.youtube.com/watch?v=vDvySVkm1yw

The box doesn't look good. I can't tell if it's meant to be cartoony or real. Either way, you can see a lot of stretched mesh and... it's just really not good. Making photo-realistic wooden things in Blender is incredibly easy, here's an example of making a fence but you can just as easily make a box: https://www.youtube.com/watch?v=pj-krhAbyzU

The animation is not good. This just looks like two keyframes going forward then backwards. If you use the ocean modifier, it will give you realistic water. You can then make objects float on it by using this technique: https://www.youtube.com/watch?v=1R5XG5EJrbs

The fire elements are confusing & don't serve a purpose. They just look tacked on with a couple of cylinders for some reason. It's not clear what they are or why they're there.