This game is not childish at all, as You may deduct from the pictures: it has wonderful, detailed graphic, eye-catching colours and smooth framerate. Also sounds system is pretty good, as in the game we can hear voice of our "Eco Punk", sounds of smashing cars, gathered rubbish. Also music is energetic, it encourages to get a glove and clean up those streets.
Steering is as comfortable as simple: just slide Your finger in the screen to move Your rabbit.
"Eco Punk" offers three different challenging modes and Open Feint support (with no symbol on the icon!) so You can upload Your highscores to Your friends. Twitter plugin make this game even more friends-sharing.
To sum up: if You like simple, joyful games with higher values - go for "Eco Punk". It is superb pick-it-up game to play in the bus, train or metro :)