I started playing this game a few days ago and have spent a good 5-6 hours playing it. I am not extremely far into it, but I felt I enjoy the experience enough to rant about its shortcomings in a short review.
First, the game is stunningly beautiful, especially for a portable title. The trees, chairs, tables, and many small walls are destructible, which adds a nice effect when you are letting gravity push you around from building to building to street to pipe to whatever.
The audio is nice but leaves a little to be desired. The dialogue is French when it has voice acting, and most of the dialogue is not voiced. The NPC noises are also obnoxious after the first few hours of listening to them whine and scream. Overall, I just feel that the audio could use some work. It isn't good, but it isn't bad.
The game is free to anyone with a Playstation Plus membership, so it's hard not to recommend it. Assuming you are considering purchasing the game, you should definitely give it a try.