What a visually appealing game! I really loved the art on this one. The illustrations reminded me of Quentin Blake's work, and brings me back to my childhood of reading Roald Dahl novels. The watercolor background and parallax layers really do make you feel like you're traversing in water. Even the Sonar ping was wonderfully colored.
The SFX also added atmospheric tension to the game. I did hesitate to venture forth as the surroundings got darker and the music loomed ominously.
I didn't manage to get to an objective, but I suspect this was a navigational error on my part. I did get to what looks like a pair of radioactive goggles where my hard-earned thrash disappeared, but I missed seeing what the characters said about it (something about polluting the sky).
With some polish and finessing, I think this might be a candidate for an entertaining interactive children's book! Kudos to the team for the entry!