Grow is basically Hungry Shark, albeit without the blood. I have a little problem with the control scheme, but you can change that in the game. It's a fun little game if you want a kid-friendly version of Hungry Shark.
The premise is simple: you're ONE fish in the environment (jar, aquarium, etc.) and you need to eat other fish (and avoid the bad fish), and collect coins (from eating fish) while you can. You can choose from several control schemes, like "swim to this spot" (touch the screen) to traditional virtual control pad, to tilt controls, but the idea is the same: eat other fish as fast as you can, and collect coins as much as you can.
There are two "maps" each with many like 15 "levels" in the free version. The full version has more. Each level will be rated for amount of success (how many coins you got and how much time you took).
Lots of short fun, albeit a bit primitive.
Rating: Try it!