It'sa lazy Saturday and I am glued to this game. I was stuck in level 10 for the longest time till I figured I should do away with the smaller balls one by one before dealing with the bigger ones. Now I'm stuck at level 12. The disadvantages I see with the game is there is no way to pause it and every time you run out of lives you need to start afresh. Check out Miniclip's site for more interesting logic games like Bloxorz, Scribble etc.