Hi Rasa,
Your dolphin is so adorable, the golden beach and green coconut tree just looks like the real paradise.
And the colour theme is really fit your design and it's very confortable for use experience. Espicailly the button background colour and the button highlight colour are matched well.
Just one advice the move button and grow button is a little small and to tight, it would be great if it can be larger. Just for my opinion.
Tracy