This was a very interesting game to play. The difficulty for each level is just right: not too hard, but at the same, it's not easy. I just wished it was longer!
Why is it that when I pop all the balloons and get all the stars, I still get an "OK"? In the first few tutorial levels where it told me where to put the balloons are the only ones I haven't gotten an OK on even though I'm doing everything correctly.