Also, I lol'd at the turtle on page 2. That's classic.
I put a nice review up for you on the main website. Thought I'd point out a few things here that are a little more sentence level.
A little later you said, "The sea monster looked like a whale and a shark had had a baby, and the shark had been large."
I know this sounds concrete and easy to picture, but it's actually pretty abstract. Brandon Sanderson talked about this in one of his lectures. He pointed out that the word, "dog," sounds concrete, but everyone who hears the word pictures a different dog.
Same thing here - different whale, different shark.
I really appreciate how direct your writing is, how fast it moves and how you trust the reader. You have room to add things in and slow down some.