Not bad at all.
Although it wasn 't all too addicting, I do like the idea of having different levels of difficulty and with these adding more balls into the mix. That was an interesting twist. I think if you added some backgrounds and perhaps some music. Who knows? This might be a hit. You have to keep in mind that you have to please all the different parts of our brains. A little more effort and creativity into this one and it would be an instant classic. But overall I still really enjoyed the game!