That looks great, although me personally, I'd add the word "Sorry", as in, "Sorry, this hack can only be played on". It's no big deal. It's just how I am. To me, it shows a little bit of compassion.
As for the color choices of the water color, that's a tough call. I'd say definitely the first or second. But the colors are more vibrant in the first one, and you can actually see the green seaweed and yellow sand.
But also, I'm a little biased, as I love summer, and I'd go with the one that is more summer-ish to me. I'm torn between the first and second, but I'll choose the first one.
I was curious to see what the first image would look like with the second image's sky color. So I changed it to see:
And I must say, I really like it! What do you think?