I'm new to Google Play, but I proudly present you: Fishy by ACED GAMES.
In this game you are a fish who wants to grow as big as possible. You grow by eating the fishes smaller than you but you have to watch out for the fishes bigger than yourself. You can control your fish by tilting your phone/tablet.
You can challenge yourself in the Campaign mode or play single games with various difficulties.
Please rate the game if you like it! Comments are appreciated as well.