Several others have reviewed this game and said it's based on Spore. I presume they are referring to the very first stage of a Spore game which is just a mini-game. To be accurate, Spore (2008) actually copied flow (2006). Flow was originally a free flash game and was part of the creator's masters thesis.
Yes, this game is VERY much like the game Flow on the PS3. But it is not the same game nor created by the same people. The mechanics are largely the same but this game goes for a more complex evolution where there's three different kinds of food (instead of 2) and you have to eat a LOT more to increase your creature's size.You get to look at the creature's stats as it grows and guide them by eating different types of food.
If you enjoyed Flow you'll very likely enjoy this game. It's graphicsa are very vivid and colorful. It's slow paced with no set time limits or precise goals, so it's good for just chilling out. There's a few flaws like having to hold down the left mouse button constantly but you can use the keyboard to control it. But really it's quite enjoyable, especially if you are into playign zone/chill games