Good
I remember playing a game with my brother, one of us holds a small basket, and the other one sits 5 feet away and tries to throw a small ball into the basket. Level 1 would be the basket is totally still, level 2 it's moving, level 3 it's moving fast, level 4 it's doing corkscrew's and so on...
This is the first game, flash or console, that somewhat resembles that. I've always waited for that! I wish the balls would move faster though, it's really getting annoying having to waste so much time.