I'm giving this 5 stars because it's beautiful and challenging, frame-rate issues aside. I trust that the devs are on this and as it's currently free, you can't lose. I had a blast playing despite the slow down. The physics are really nicely done, and did I mention that it's gorgeous? The discs are like those wind chimes and the noise they make upon collision is the same, too! I'm glad that I picked this up now, for free, but I'd certainly pay for it. Ok, now I'm going back to playing this gorgeous game on my gorgeous iPad!
Dubble is available for $4 from the Apple iTunes App Store