Quite fun, but ridiculously tough
This game is quite fun to play, but in terms of difficulty makes even "The World's Hardest Game" seem like a walk in the park. The ball moves so fast and the controls are so sensitive, my reactions aren't nearly fast enough to finish each level without dying at least ten times. That combined with the fact that I get frustrated easily, makes the overall game experience more stressful than enjoyable.
I eventually gave up on level 39 after dying about 100 times. :-(