If you’re just here to play through the story, so be it, you’ll probably have a good time. If, however, you’re a completionist going after the OCD awards, you’ll be exceedingly frustrated.
First, and this is huge, once you have enough goo balls in the tube to satisfy the level requirements, a giant cord drops in front of the gameplay area that said continue. In the first level with only black balls, this is okay. In latter levels with green balls were you want to disassemble the structure to claim more balls, you can’t! Or, at least, you have to do so while carefully avoiding the unappreciated button.
Second, retrying is a PITA. Once the level is completed, you’re forced back out to the level picker screen. Retrying involves selecting the same level, watching whatever intro video is programmed into it, and then starting the level. Repeat this a few times and you’ll understand how painful it is.
Third, let’s say you just completed a level and want to see how close you are to the OCD award. Should be easy, right? Nope. See point two above. Hey through the dumb cut sequence. Now find a buried menu option that’s only just available and find out what the goals are. Hopefully you remembered what scores you got on your previous attempt, because the game sure doesn’t.
So ya, all in all, it’s still world of goo, but they made some really unfortunate small-screen decisions that make replaying the game painful.