This was very cool. I especially think you did an awesome job of capturing the feel of the ocean for such a short game. I think the pace of the game worked very well with that. if it were a longer game it would be frustrating to get anything done, but it was short enough for that not to matter much.
If I would change anything it would be to add a reticle to aid in shooting but even that wasn't too much of a problem. :)