I love how simple it is

As the others said you might want to make the ladder look better.
Also, I found some little texture problems, some screenshots:
The texture is misaligned - I would move that texture "to the left" so it's aligned.

In my opinion the lamps would look better if you applied a metal texture on the top instead of the light texture ^^

One of the corners of the box looks like it's floating on the water

By now I didn't find anything else

Cheers