Simple addicting fun.
I was expecting a lame knock off of Qix or J-Ball and was instead pleasently surprised to find a physics based game with a nice twist.
Although I think this game could use a bit more polish (better graphics and some different music), it was really fun. I played it several times and will likely bookmark it so I can play some more later. I also found I had much better luck when I realized I could move around the ball as it filled.
I noticed a bug with the bouncing balls (which I wish were a different color so they stood out more) whereby they would sometimes get pushed through to the other side of the playfield. Other than that, this is a great simple game that I really enjoyed.